| Day | Title | Code | Tests | Tags |
|---|---|---|---|---|
| Day 1 | Chronal Calibration | code | tests | |
| Day 2 | Inventory Management System | code | tests | |
| Day 3 | No Matter How You Slice It | code | tests | |
| Day 4 | Repose Record | code | tests | |
| Day 5 | Alchemical Reduction | code | tests | |
| Day 6 | Chronal Coordinates | code | tests | |
| Day 7 | The Sum of Its Parts | code | tests | |
| Day 8 | Memory Maneuver | code | tests | |
| Day 9 | Marble Mania | code | tests | |
| Day 10 | The Stars Align | code | tests | |
| Day 11 | Chronal Charge | code | tests | |
| Day 12 | Subterranean Sustainability | code | tests | |
| Day 13 | Mine Cart Madness | code | tests | |
| Day 14 | Chocolate Charts | code | tests | |
| Day 15 | Beverage Bandits | part 1 - part2 | part 1 - part 2 | elves vs goblins |
| Day 16 | Chronal Classification | code | tests | opcodes; instructions; combinations |
| Day 17 | Reservoir Research | code | tests | 2d coord; water boxes; overflowing |
| Day 18 | Settlers of The North Pole | code | tests | |
| Day 19 | Go With The Flow | code | tests | opcodes; instruction pointer |
| Day 20 | A Regular Map | code | tests | |
| Day 21 | Chronal Conversion | code | tests | opcodes; instruction pointers; sequence |
| Day 22 | Mode Maze | code | tests | 2d coord; modulo; cheapest path |
| Day 23 | Experimental Emergency Teleportation | code | tests | nanobots; manhattan; 3d coordinates |
| Day 24 | Immune System Simulator 20XX a.k.a. Corona vs Vaccine |
code | tests | |
| Day 25 | Four-Dimensional Adventure | code | tests | stars; chain of constellations |