AdventOfCode2021 - Day 20

This is a thread to discuss Day 20

It is VERY important NOT to write any public spoilers :slight_smile:
ALWAYS keep spoiler stuff hidden inside one of these


This text will be hidden

which you can obtain by clicking on the gear icon


Is this for today or for tomorrow? (My timezone. It's 10:15 Dec. 21)

Eventually done Part 1 and Part 2


It is for Day 20

But is day 20 Dec. 22?

No - Day 20 starts at midnight transition between the 19th and the 20th Dec in Eastern Standard Time USA

So Day 20 started at 05:00 UTC on 20th December

Just for reference, Day 22 started 18 minutes ago (it is 05:18 UTC at moment)