"Sat, 15 Jun 2024 15:54:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
15:54:38
General datetime
2024-06-15 15:54:38Z
For Database
2024-06-15 15:54:38
For HTTP1.1
Sat, 15 Jun 2024 15:54:38 GMT