Will tell you if it's an A or B day.

Useful if you have workouts you do every other day and need a way to keep track.

Example

2024/1/1 = 2A day

2024/1/2 = 2B day

2024/1/3 = 2A day

2024/1/4 = 2B day

Also it keeps track of every third day like 3A 3B 3C to help me keep track of when to clean the humidifier.