Every week, olivia_j will post a new challenge for the comm, which is usually a word or phrase. These challenges are tagged according to the challenge number in the style of "challenge###". These challenges begin on Sunday and last the week, and you may post as many fics as you'd like, providing they follow the comm rules.
We also host Drabble Cycles. The time limit on these Cycles is not set in stone, but we usually host one or two per year. For these events, there is a theme with a table of prompts, and you can make a claim on a specific fandom, pairing, or character. The current Drabble Cycle is Fanfic Tropes, and you may still make a claim and post fills. Fills for previous Cycle claims can go on our sister community, femslash100100.
And lastly, one of our most popular events is our Drabble Tag. We have currently just ended our seventh Drabble Tag, which consists of filling one prompt and then providing up to two more prompts, allowing prompts and fics to build and build. Here are the links to Drabble Tag 1, 2, 3, 4, 5, 6, and 7. The next round will be announced in Spring of 2017.
Please don't hesitate to contact me with any questions you may have!