"Sat, 20 Apr 2024 20:15:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240420
Only TIME
20:15:23
General datetime
2024-04-20 20:15:23Z
For Database
2024-04-20 20:15:23
For HTTP1.1
Sat, 20 Apr 2024 20:15:23 GMT