"Sun, 21 Jul 2024 15:49:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
15:49:20
General datetime
2024-07-21 15:49:20Z
For Database
2024-07-21 15:49:20
For HTTP1.1
Sun, 21 Jul 2024 15:49:20 GMT