"Sun, 21 Jul 2024 18:38:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
18:38:40
General datetime
2024-07-21 18:38:40Z
For Database
2024-07-21 18:38:40
For HTTP1.1
Sun, 21 Jul 2024 18:38:40 GMT