On the 28th of each month, the Night Of The Comet commences, in which the titular comet will fly pass Growtopia for 24 hours. The first event happened on the November 28, 2014, a day after the update was introduced.
If one happens to be online at midnight on the 28th, they will see the following message: "What's that in the sky?? A Comet is blazing a trail through the night! It will only be here for 24 hours..." All weathers in the worlds will then be changed into dark green hills set at night with the comet in the background moving accordingly to the time.
Comet Dust and Antimatter Dust will spawn during the day in worlds depending on how many people there are. Some exclusive trees can then be spliced with Starseed or Galactic Starseed (which one can get from consuming 200 Comet Dust or 200 Antimatter Dust, respectively) during this time.
- The message players got at midnight before the first event took place said: "Some astronauts are working on something."
- During the Night of the Comet, the Geiger Counter will be really hard but still able to used. It would always detect radiation where ever the player goes, since the passing comet emits great radiation. If one still manages to find something during the Night of the Comet, they will get the Atomic Luck achievement.
- On November 27, 2014, players were able to obtain Night Of The Comet clothes from purchasing Rare Clothes Packs. This mistake was later corrected.