"Sun, 21 Jul 2024 15:30:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240721
Only TIME
15:30:30
General datetime
2024-07-21 15:30:30Z
For Database
2024-07-21 15:30:30
For HTTP1.1
Sun, 21 Jul 2024 15:30:30 GMT