"Sun, 16 Jun 2024 13:40:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240616
Only TIME
13:40:13
General datetime
2024-06-16 13:40:13Z
For Database
2024-06-16 13:40:13
For HTTP1.1
Sun, 16 Jun 2024 13:40:13 GMT