The Ludum Dare Game Jam is one of the world’s largest game jams. In 2019 alone it amassed over 47,000 participants.
Where?
The ludem dare gamejam can be found at its own website(https://ldjam.com/) or at itch.io(https://itch.io/jams), one of the most popular game jam hosting sites
When?
Typically, it runs 48-72 hours over the weekend.
Why?
The Ludum Dare game jam is one of the longest running game jams to date and inspired many games such as Hollow Knight, Inscription, Loop Hero as well as many others. Having a good standing in a game jam can show you that something in your game jam worked and might be worth pursuing, it can also look great on a resume to place highly in a game jam like this.