"Mon, 19 Jan 1970 03:43:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
03:43:47
General datetime
1970-01-19 03:43:47Z
For Database
1970-01-19 03:43:47
For HTTP1.1
Mon, 19 Jan 1970 03:43:47 GMT