"Sat, 18 May 2024 14:13:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
14:13:12
General datetime
2024-05-18 14:13:12Z
For Database
2024-05-18 14:13:12
For HTTP1.1
Sat, 18 May 2024 14:13:12 GMT