"Sat, 17 Feb 2024 20:15:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240217
Only TIME
20:15:15
General datetime
2024-02-17 20:15:15Z
For Database
2024-02-17 20:15:15
For HTTP1.1
Sat, 17 Feb 2024 20:15:15 GMT