"Sat, 20 Apr 2024 20:15:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240420
Only TIME
20:15:45
General datetime
2024-04-20 20:15:45Z
For Database
2024-04-20 20:15:45
For HTTP1.1
Sat, 20 Apr 2024 20:15:45 GMT