Use unix timestamp for inputTime and return value

[philonor]

Problem

• Return value (number of seconds) is "local time"
• Turning number of seconds into usable representation (unix timestamp / moment.js) requires unnecessary effort (if timezone offset or DST has to be taken into account)

Possible solution
Always use a unix timestamp representation, both for specifying inputTime and also for return value.

Workaround

[blparker]

+1

[dts]

I actually disagree, or think this should be optional. The headaches that this introduces from a timezone perspective alone is enough to complicate this library a great deal.

[rajeshwarpatlolla]

Users may or may not use the moment library. Even if they use moment library you can convert the returned epoch to the local timezone, and then you can easily convert it using moment methods.