Participation is simple, just click the "Copy Hashtag" button to copy the hashtag and curators to the clipboard. Jump over to Google+, upload an appropriate photo for the theme and paste the text at the end of your post. Do not modify this string. Google+ will convert all the +101140516949313637221 type numbers to working curator and theme page links when you submit the post. Easy Peasy!

I just put the list together, so I'm not responsible for every theme, just the ones I'm curating. I assembled the list for the community's benefit, not my own. On the search page, there is a handy "Save this Search" button where you can have quick access to it on the sidebar whenever you need it.

This list is big and growing fast so treat it a lot like the menu at your favorite restaurant and all the items are on the a la carte menu. Pick and choose your favorite themes and have fun!

General Themes

These tags are not linked to any single day and easily combined with other tags and themes.

  • #PortraitPoker: Please post portraits. A portrait is a photograph in which the subject of the photograph is a person (or animals on occasion.) Trash-talking and bluffing are encouraged. This is a poker game! But please try to keep the conversation intelligent. Please follow the current theme which changes by announcement.
  • #BathroomSelfie: Share creative and fun self portraits (selfies) taken in a bathroom.
  • #CrtiquePls: Do you want to get serious constructive criticism on a photograph you've been working on? Simply use the tag #CritiquePls in your post and share the photo publicly. That way people who see the tag will be free to share their thoughts knowing they won't hurt your feelings. Please keep the comments civil and professional. For more information read Karin Nelson's post found here.

  • #FineArtPls: Place this tag on any photo from any genre except nudes (G+'s rules) that have been created primarily for aesthetic purposes and judged for its beauty.
  • #AllThingsRed: Share photos full of the color red. G+ Page: +AllThingsRed
  • #YisforYellow : Share photos full of the color yellow. G+ Page: +YisforYellow
  • #LandscapePhotography: Share any kind of Landscape photo. G+ Page: +Landscape Photography
  • Low Angle Photography Share a photo shot from a camera positioned low on the vertical axis, anywhere below the eye line, looking up. Use #LowAnglePhotography in your post. G+ Page: +Low Angle Photography

Sunday

  • Sacred Sunday: Share photos of churches, cathedrals, religious subjects or anything that is sacred to you. Use #SacredSunday tag in your post.
  • Iconic Family Photo:  Share a photo that defines your family. Not so much on photographic quality, but one that is important to your family. Please accompany a description telling us why it's iconic. Use #IconicFamilyPhoto in your post.
  • Selfless Sunday: Share a photo from another photographer giving them full credit and all the love. Use #SelflessSunday tag in your post.
  • Desert Sand Day: Share a photo with a sandy desert as the subject. Use #DesertSandDay tag in your post.
  • Sky Sunday:  Share a photo where the sky or severe weather is the subject. Use #SkySunday tag in your post. G+ Page +Sky Sunday.
  • Steamy Sunday: Share an image where steam is the subject. Everything from steam engines to the steam that rises from your kettles. Tag #SteamySunday
  • Straight out of Camera (SOOC) Sunday: Share an image that has zero post processing. You are allowed to crop and resize the images only. Tag with #SOOCSunday.
  • Square Sunday: Share a photo that is cropped 1:1 square. Tag #SquareSunday.
  • Star Trails Sunday: Share a photo that includes start trails. Use tag #StarTrailSunday.
  • Street Art Sunday: Share a photo featuring graffiti, paste ups, stencils and other kind of interventions in public spaces. Tag #StreeArtSunday.
  • Birds of Prey Sunday: Share a photo featuring wild birds of prey. Tag #BirdsofPreySunday.
  • Spider Sunday: Share a photo featuring a spider. Tag #SpiderSunday.
  • Sign Sunday: Share a photo that has a sign in it. Tag #SignSunday. G+ Page.
  • Zen Sunday: Share a photo that embodies simple beauty. Simply beautiful, expressive and pure images which fills the one who sees them with inner peace and spiritual energy. Contemplative, mindful and serene photos. Creative use of negative space and an artistic touch can be part of shaping that Zen feeling. Tag #ZenSunday.
  • World Culture Sunday: Images should visually describe something about a culture. What they think, how they live and/or it's history. This could be statues, people, festivals, ceremonies, architecture and lifestyle. Please remember, A "travel snapshot" does not necessarily equal a "cultural" photograph. Tag #WorldCultureSunday G+ Page.
  • Sunday Subtle Landscapes: Nature and Landscape images that are tranquil and soothing. Tag #SundaySubtleLandscapes.
  • Shadows on Sunday: Share a photo of shadows of any kind. Tag #ShadowsOnSunday. G+ Page is +ShadowsOnSunday.
  • Splash Sunday: Share a photo of a splash. Tag #SplashSunday.
  • Door Sunday: Share a photo of a door or gate from around the world. Tag #DoorSunday G+ Page.

Monday

  • Mountain Monday: Share a photo with mountains. Hashtag #MountainMonday (+Mountain Monday)
  • Macro Monday: Share a macro photograph. Use #MacroMonday tag in your post.
  • Monochrome Monday: Share a photo presented in Black & White. Use #MonochromeMonday. G+ Page +Monochrome Monday.
  • Ministract Monday:  Ministract \ˈmi-nə-ˈstrakt\ - Of or pertaining to that which might be minimal, might be abstract or might even be both. Use #MinistractMonday tag in your post.
  • Military Monday: Share a photo where the military is the subject. Use #MilitaryMonday tag in your post.
  • Action Monday: Share an action sports photo. Use #ActionMonday tag in your post.
  • Moody Monday: Share a photo that has a dark, moody and bleak feel. Use #MoodyMonday tag in your post.
  • Mirror Monday: Share a photo where a reflection is the subject. Use #MirrorMonday tag in your post.
  • Moonrise Monday: Share a photo of a true moonrise which usually occurs the evening before the full moon. It will usually rise just after sunset when there is still that magical light. It only happens 12 times a year. Check out the moon calendar. This is planned to run every Monday following the full moon. Tag #MoonriseMonday
  • Mystery Monday: Share a photo which sparks the question "What is it?". Use #MysteryMonday tag.
  • Mobile Monday: Share a photo taken with a mobile phone. Use #MyMobileMonday tag.
  • Midair Monday: Share a photo where the main subject is a person, pet, or object captured in midair. Use #MidairMonday tag.
  • Mosaic Monday: Share photo mosaics (collages). Any subject: botanical, life-cycle, sequential, colors, numbers, etc. Not photos of real mosaics but photo mosaics that you create using any number of tiles (panes) and any configuration. Please check hashtag for examples. Use #MosaicMonday tag. G+ Page
  • Medium Format Monday: Share a photo shot on a medium format camera. Use #MediumFormatMonday tag.
  • Metallic Monday: Share a photo of something metallic. Use #MetallicMonday tag. G+ Page is +#MetallicMonday
  • Nature Monday: Share a landscape photo. Use #NatureMonday tag.
  • Minimal Monday: Share a landscape image that emphasizes minimalism. Use #MinimalMonday tag.
  • Backyard Birding Monday: Share a photo of a bird shot from your backyard. Use #BackyardBirdingMonday tag.
  • Monkey Monday: Share a photo of a monkey. Use #MonkeyMonday tag.
  • Motorsports Monday: Share photos related to motorsports. This can be anything on land or water and number of wheels irrelevant as long as its fast! Use #MotorsportsMonday tag. G+ Page +Motorsports Monday
  • Leading Lines Monday: Upload or share a photograph with Leading Lines. Use #LeadingLinesMonday tag. G+ Page: +Leading Lines Monday
  • People at Work Monday: Share a photo depicting someone working. Use #PeopleAtWorkMonday tag. G+ Page: +People At Work Monday
  • Mathematical Mondays: Share a photograph that is mathematical or analytical in nature. Tag #MathematicalMondays. +Analytically Speaking G+ Page.
  • Moustache Monday: Share a photo featuring an awesome moustache to help promote Movember bringing awareness to prostate cancer. Tag #MoustacheMonday. G+ Page +MoustacheMonday

Tuesday

  • My Town Tuesday: Share a photo taken locally. No wider than your county. Use #MyTownTuesday tag in your post. G+ Page: +My Town Tuesday
  • Tree Tuesday: Share a photo where a tree is the subject. Use #TreeTuesday tag in your post.
  • Tone-map HDR Tuesday: Share a photo that is processed as an HDR. Use #TonemapHDRTuesday tag in your post.
  • Tuesday Decay: Share a photo centered around abandoned or forgotten architecture, engineering, infrastructure, etc. Use #TuesDecay tag in your post.
  • Today Tuesday: Share a photo that was taken TODAY. Use #TodayTuesday tag in your post.
  • Portrait Tuesday: Share any form of portraiture using natural and stobist light sources. Use #PortraitTuesday tag in your post.
  • Toy Tuesday: Share a photo with a toy as the subject. Use #ToyTuesday tag in your post.
  • Archi-Texture Tuesday Share a photo where architecture is the subject, with an emphasis on finding the right balance in the structure's texture. Use #ArchiTextureTuesday tag in your post.
  • Transport Tuesday: Share a photo that features all forms of transportation except 4-wheeled ones. Tag #TransportTuesday. G+ Page
  • Equine Tuesday: Share a photo featuring a horse. Tag #EquineTuesday
  • Sea Tuesday: Share a photo of the sea or anything related to it. Tag #SeaTuesday G+ Page
  • Two Times Tuesday: Share a 2 photos that depict the before and after processing. Tag #TwoTimesTuesday
  • Candid Mood Tuesday: Process a candid shot in any way to enhance the mood! Tag #CandidMoodTuesday. G+ Page
  • Vintage Camera Tuesday: Share a photo taken of a vintage camera. Tag #VintageCameraTuesday and G+ Page +Vintage Camera Tuesday.
  • African Tuesday: Share an image that embodies any aspect of Africa: wildlife, landscapes, travel, documentary, rural, urban, culture or social issues. Tag #AfricanTuesday. +African Tuesday G+ Page.

Wednesday

  • Waterfall Wednesday: Share your best waterfall shot, big or small. Every week I try to list the best shots and showcase them here on my blog. Tag your post with #WaterfallWednesday
  • Wildlife Wednesday: Share a photo with wild animals in their natural setting. Use #WildlifeWednesday tag in your post.
  • We Love Music Wednesday: Share a photo where music/concerts are the subject. Use #WeLoveMusicWednesday tag in your posts.
  • Whatever Wednesday: Share images that make you laugh, surprise you or made you say “What in the world?". Use #WhateverWednesday tag in your post.
  • Women Wednesday: Share a photo that expresses the power and beauty of women. Use #WomenWednesday tag in your post.
  • One Prime Wednesday: Go out shooting restricting yourself to shooting with a single prime lens. Use #OnePrimeWednesday tag in your post.
  • Wide Wednesday Panoramas:  Panoramas wide and tall, images cropped to a 2:1 aspect ratio or multiple frames stitched together. Tag #WideWednesdayPanorama and G+ Page +WideWednesdayPanorama.
  • Light Writing Wednesday:  Share images with lightwriting and lightpainting. Tag #LightwritingWednesday
  • Window Wednesday: Share a photograph taken through a window either from work, or home. Any window, window frame or interesting windows such as stain glass. Tag the image using by mentioning the Theme page #WindowWednesday in your post.
  • Love Wednesday: Share a photo that expresses love. Tag #LoveWednesday. G+ Page
  • Where Am I Wednesday: Share a photo of any place and have people try to guess where it is. Tag #WhereWednesday G+ Page
  • Wide Angle Wednesday: Share a photo taken at a wide-angle focal length, less than 40 mm. Hash tag #WideAngleWednesday and G+ Page +Wide Angle Wednesday
  • Windy Wednesday: Share a photo that depicts the wind blowing. Hash tag #WindyWednesday and G+ Page +Windy Wednesday
  • Way Wednesday: Roads, trails, well trodden paths, any and all 'ways' imaginable. Hash tag #WayWednesday
  • Wharf Wednesday: share your best Wharf shots on Wednesday. Hash tag #WharfWednesday (+Wharf Wednesday)
  • Wet Wednesday: Share a photo that depicts the beauty that is water. Hash tag #WetWednesday (+Wet Wednesday)

Thursday

  • Thirsty Thursday: Share all things water: seascapes, lakes and rivers are the subject. Use #ThirstyThursdayPics tag in your post.
  • Silhouettes On Thursday: Share a photo where a silhouette is the subject. Use #SilhouettesOnThursday tag in your post.
  • History Thursday: Share a photo of something historic, preferably man-made. Post a brief explanation or a link to explain the history when possible! A brief FAQ here. Use #HistoryThursday tag in your post.
  • Long Exposure Thursday: Share a photo  of any subject taken with a long exposure. Use #LongExposureThursday tag in your post. +LongExposure Thursday is the official theme page.
  • Travel Thursday: Share a photo where traveling is the subject. Use #TravelThursday tag in your posts.
  • Texture Blend Thursday: Share photos that have been processed and blended together using 1 or more textures. Use #TextureBlendThursday tag in your post. G+ Page.
  • Theoretical Thursday: Share a photo that conceptualizes an idea or is in the form of abstract art. Use #TheoreticalThursday tag in your post.
  • Lighthouse Thursday: Share a photo of a lighthouse. Tag #LighthouseThursday
  • Throw Away Thursday: Share a photo that's so accidentally bad, it's funny. Tag #ThrowAwayThursday OR #TAT
  • Caption This Thursday: Share a photo that lends itself well to captioning. Commenters will suggest a caption and anyone can +1 their favorite caption. Then 24-48 hours later, the original poster will re-share the image with the best (most +1s) caption. Tag #CaptionThisThursday.
  • In Motion Thursday: Share a photo showing motion and movement like panning, blurs, zooming effects and Intentional Camera Movement (ICM). Tag #InMotionThursday.
  • Damn Near Dead Thursday: A place to share stories of dangerous, daring and flat out stupid adventures in Photography! Tag #DamnNearDiedThursday G+ Page.
  • Low Key Thursday: Share a photo taken with the low key style. Tag #LowKeyThursday. G+ Page +Low Key Photography.
  • Coastal Thursday: Share a photo dedicated to images of the coastal environment, life on the coast and coastal activities worldwide. Tag #CoastalThursday. +Coastal Thursday G+ theme page.
  • Lensbaby Thursday: Share a photo shot using a Lensbaby lens. Tag #LensbabyThursday.
  • PixelBenderism On Thursday: Share a photo processed with the Pixel Bender plugin that's available for Photoshop CS5 and newer. Tag #PixelBenderismOnThursday. PixelBenderism On Thursday G+ page.
  • Coffee Thursday: Creative photography about coffee. Tag #CoffeeThursday.

Friday

  • Four Seasons Friday: Share a photo showing off the current season we're in. Use #FourSeasonsFriday tag in your post.
  • Floral Friday: Share a photo where flowers are the subject. Use #FloralFriday tag in your post.
  • Food Friday: "Watch what you eat" and share a photo where food is the subject. Use #FoodFriday tag in your post.
  • Four-wheeled Friday: Share:  All things vehicle related, cars, bikes, motorcycles and unicycles. Use #FourWheeledFriday in post.
  • Film Friday: Share a photo shot on film. Please share information about what camera, film and developing were used. Use #FilmFriday tag in your post.
  • Fungus Friday: Share a photo of any variety of fungi. Use #FungusFriday tag in your post.
  • Frightening Friday: Share an image that captures an element of fear, danger or drama. Use #FrighteningFriday tag in your posts.
  • Fire Friday:  Anything fire goes-from a wildfire, to a tip of a match shot macro, to even smoke from a fire, fire houses, fire hydrants and fire hoses. Fire People! Tag #FireFriday
  • Fido Friday: Share a photo featuring man's best friend, the dog. Tag #FidoFriday 
  • Frog Friday: Share a photo with of a frog. Tag #FrogFriday
  • Fisheye Friday: Share a photo taken with a fisheye lens. Tag #FisheyeFriday. G+ Page +FisheyeFriday
  • Infrared Friday: Share a photo taken with with an IR filter, a converted camera or produced in post production. Tag #InfraredFriday
  • Fashion Fridays: Share a photo that emphasizes the look and feel of fashion. Tag #FashionFridays
  • Feelings Friday: Share a photo that expresses strong human emotion. Everything from joy and sadness to anger and jealousy. Tag #FeelingsFriday
  • Forest Friday: Share a photo of a forest. Tag #ForestFriday
  • Feet Friday: Share a photo featuring feet. Tag #FeetFriday G+ Page
  • We Are Parents: Share a photo that embodies what it means to be a parent. The great joys and the great frustrations. Tag #WeAreParents
  • Foggy Friday: Share a photo taken in the fog. Tag #FoggyFriday
  • Feel Good Friday: Share a photo that makes you feel warm and fuzzy. Tag #FeelGoodFriday. G+ Page
  • Friday Getaway: Images involving vacation travel, outdoor sports, recreation, and lifestyle. Images with roads, bridges, trains, boats, hiking, camping, fishing, chairs on a beach, etc. Tag #FridayGetaway.
  • Filter Friday: Share a photo that used a physical glass filter or one applied in post production with software. Share also what filter you used in the description. Tag #FilterFriday.
  • Plastic Lens Friday: The only requirement is a physical plastic lens must be used to take the shot - software simulations of plastic lens photos don't count. Tag #PlasticLensFriday and G+ Page +PlasticLens Friday.
  • Fly Fishing Friday: Share a photo that features fly fishing. Tag #FlyFishingFriday.
  • iPhoneography Friday: Photos taken with an iPhone. Tag #iPhoneographyFriday.
  • Astro Friday: Photos astronomy related. Tag #AstroFriday. G+ Page +AstroFriday
  • Night Photography Friday: Shots of any subject only that it be taken at night. Tag #NightPhotographyFriday. G+ Page +Night Photography Friday

Saturday

  • Sepia Saturday: Share a photo processing in sepia. Use #SepiaSaturday tag in your post.
  • Sunset Saturday: Share a shot where the sunset/rise is the subject. Use #SunsetSaturday tag in your post.
  • SpeedySaturday: Share a photo taken with a fast shutter speed to freeze fast motion. Use #SpeedySaturday tag in your post.
  • Street Saturday: Share a photo taken on the street. Use #StreetSaturday tag in your post.
  • Saturday Night Light: Share a photo taken at night. Any subject with artificial light, indoors or outdoors. No Sunlight. Use #SaturdayNightLighttag in your post.
  • Caturday: Share a photo of a cat. Tag #Caturday
  • Songbird Saturday: Share a photo of wild songbirds. Tag #SongbirdSaturday.
  • Rolling Shutter Saturday: Share a photo using the rolling shutter technique. Example. Tag #RollingShutterSaturday.
  • Rural Saturday: Share a photo that is all things rural. Everything from farm and fields, to farm machinery, to views of rural living. Use tag #RuralSaturday. G+ Page
  • Still Life Saturday: Share a still life themed photo. Tag #StillLifeSaturday
  • Unsharp Saturday: Share a photo that is intentionally out of focus or uses soft focus. Tag #UnsharpeSaturday
  • Sword Saturday: Share a sword or battle type image. Tag #SwordSaturday
  • Sleepy Saturday: Share an image of people and animals sleeping or anything concerning sleep. Tag #SleepySaturday. G+ Page.
  • Stone Saturday: Share all photographs about stone, geological structure (fold, fault, cliff, gorges) or where use of stone is highlighted. Tag #StoneSaturday (+Stone Saturday).
  • Saturday Style: Share a photo that represents your idea of style. Tag #SAS.
  • Seedurday: It's all about seeds and seed-related imagery. Tag #Seedurday. G+ Page: +Seedurday