"Thu, 29 Jan 1970 04:40:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
04:40:47
General datetime
1970-01-29 04:40:47Z
For Database
1970-01-29 04:40:47
For HTTP1.1
Thu, 29 Jan 1970 04:40:47 GMT