"Sun, 21 Jul 2024 18:35:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
18:35:00
General datetime
2024-07-21 18:35:00Z
For Database
2024-07-21 18:35:00
For HTTP1.1
Sun, 21 Jul 2024 18:35:00 GMT