"Sun, 21 Apr 2024 20:20:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
20:20:12
General datetime
2024-04-21 20:20:12Z
For Database
2024-04-21 20:20:12
For HTTP1.1
Sun, 21 Apr 2024 20:20:12 GMT