"Sun, 21 Jul 2024 13:08:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
13:08:21
General datetime
2024-07-21 13:08:21Z
For Database
2024-07-21 13:08:21
For HTTP1.1
Sun, 21 Jul 2024 13:08:21 GMT