Unix timestamps and Filesystem timestamps would be Useful

[zippy1981]

Converting between VBA Dates and seconds since the unix epoch would be useful things to have. Do they belong in this library?

[timhall]

Hmm, I'll research Unix time a little more, but it looks like it'd fit well here.

[timhall]

Found the following:

http://stackoverflow.com/questions/12325948/excel-vba-convert-a-date-string-to-a-unix-timestamp
https://en.wikipedia.org/wiki/Unix_time
http://www.unixtimestamp.com/

Tested this against the last link and seems to be working:

Function ConvertToUnix(LocalDate As Date)
  DateDiff("s", DateSerial(1970, 1, 1), UtcConverter.ConvertToUtc(LocalDate))
End Function

I'll add more tests and ParseUnix and add it to VBA-UTC soon. Thanks for the suggestion.