"Mon, 19 Jan 1970 19:44:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
19:44:09
General datetime
1970-01-19 19:44:09Z
For Database
1970-01-19 19:44:09
For HTTP1.1
Mon, 19 Jan 1970 19:44:09 GMT