"Sun, 21 Apr 2024 18:23:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240421
Only TIME
18:23:33
General datetime
2024-04-21 18:23:33Z
For Database
2024-04-21 18:23:33
For HTTP1.1
Sun, 21 Apr 2024 18:23:33 GMT