"Sat, 10 Jan 1970 21:09:26"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
21:09:26
General datetime
1970-01-10 21:09:26Z
For Database
1970-01-10 21:09:26
For HTTP1.1
Sat, 10 Jan 1970 21:09:26 GMT