"Sun, 21 Apr 2024 16:08:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
16:08:16
General datetime
2024-04-21 16:08:16Z
For Database
2024-04-21 16:08:16
For HTTP1.1
Sun, 21 Apr 2024 16:08:16 GMT