"Sun, 21 Apr 2024 08:37:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
08:37:03
General datetime
2024-04-21 08:37:03Z
For Database
2024-04-21 08:37:03
For HTTP1.1
Sun, 21 Apr 2024 08:37:03 GMT