1. Pronounce the first two digits together as one number, and the second two together as another
The usual way to refer to years is to pronounce the first two digits together as one number, and the second two together as another number.
- 2020 -> "twenty-twenty,"
- 2115 -> "twenty-one-fifteen."
2. When a year ends with 01 to 09, then the last two numbers are pronounced O+number
1602 -> Sixteen Oh Two
3. When a year ends with 00, then the last two numbers pronounced 'Hundred"
1600 -> Sixteen Hundred
4. When a year ends with 000 - 009
2000 -> Two thousand
2001 -> Two thousand and one
5. When a year ends with 010 - 020
Both ways are ok:
2010 -> Twenty ten, or Two thousand and ten