"Sat, 15 Jun 2024 21:04:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
21:04:05
General datetime
2024-06-15 21:04:05Z
For Database
2024-06-15 21:04:05
For HTTP1.1
Sat, 15 Jun 2024 21:04:05 GMT