I am trying to learn how to calculate date from any century. I am aware of these codes but what are the codes for a century like 1600 or 2400? Is there a formula? Is there a pattern? If so is it 42064204206420… or 420642064206? This is what I know…

- 1700s = 4
- 1800s = 2
- 1900s = 0
- 2000s = 6
- 2100s = 4
- 2200s = 2
- 2300s = 0.

Any help is appreciated.