"Sat, 20 Apr 2024 18:34:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240420
Only TIME
18:34:56
General datetime
2024-04-20 18:34:56Z
For Database
2024-04-20 18:34:56
For HTTP1.1
Sat, 20 Apr 2024 18:34:56 GMT