Want to be featured on 500px ISO? Every week, we’ll announce a new photo challenge theme. You’ll have until next Sunday, December 7 to submit your photo as an entry. You may already have an existing photo that fits the theme, or you can take this as a challenge to shoot and upload a new photo.

To skip to the new theme for next week, click here.

This Week’s Festive Photo Contest Winners

Happy Thanksgiving! Last week, we asked you to share with us your most festive photos to celebrate Thanksgiving. Although it’s known for being an American holiday, acknowledging what we are thankful for and gathering with loved ones are universal traditions that everyone should observe—and it’s totally worth celebrating, no matter where you are around the world.

We’ve received more than 200 photo submissions that made us feel festive. Thank you to everyone who entered and submitted their photos. To view all the images, you can visit our Festive contest gallery.

Ready to have a blast? From fireworks to fun moments, below are the 500px team’s 15 favorite Festive images-scroll down!

Awesome Subscription Giveaway Winner

Every week, we hold a random draw giveaway for all those who enter the contest. Anyone who enters will have the chance to win two months of free Awesome membership! This week’s lucky random winner is Onur Güner Güray. Congrats, Onur, we’ve just upgraded your account!

Next Week’s Theme: Snowed In

Winter is finally here! For some of us, it’s freezing outside and the snow is starting to fall. Why don’t we bundle up and experiment with all the creative ways to take some great photos indoors—from portraiture with indoor lighting to creating still life scenes with fireplaces, toys, and your pets!

1. Shoot a photo that fits this theme. Take a creative photo indoors.

2. Upload the image on 500px, or select a photo you’ve already uploaded to your 500px page.

3. Add the tag #500pxSnowedIn to your photo descriptions. To learn how to add tags to your photo, click here.

4. You’re done! Track all entries here.

Deadline is December 7th at 11:59 P.M. Pacific Time. For inspiration, check out these great winter-themed indoor photos:

Good luck, everyone! We’re excited to see how you photograph indoors.