"Sat, 15 Jun 2024 15:45:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
15:45:04
General datetime
2024-06-15 15:45:04Z
For Database
2024-06-15 15:45:04
For HTTP1.1
Sat, 15 Jun 2024 15:45:04 GMT