"Mon, 19 Jan 1970 02:27:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
02:27:35
General datetime
1970-01-19 02:27:35Z
For Database
1970-01-19 02:27:35
For HTTP1.1
Mon, 19 Jan 1970 02:27:35 GMT