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// Function to determine the difference between two time zones. This is
// somewhat tricky because the difference between time zones may change several
// times over the course of a year because of Daylight Saving / Summer Time
// changes which may not occur at the same time. This means that the exact
// date/time for which the conversion is to happen must be specified.
//
// This function takes three arguments:
// [z1, z2, time]
// Where z1 and z2 are strings indicating the name of a timezone and
// the optional argument time is a string indicating the date and time for
// which the conversion is to be calculated. The default is to use the
// current time in timezone z1.
// The return value is the time to be *added* to the local time in timezone z1
// to get the local time in timezone z2.
timezonediff[z1, z2, time=undef] :=
{
if (time == undef)
{
fmt = ### yyyy-MM-dd HH:mm:ss.SSS ###
time = now[] -> [fmt, z1]
}
t1 = parseDate["$time $z1"]
t2 = parseDate["$time $z2"]
return t1 - t2
}
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This is a program written in the programming language Frink.
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Alan Eliasen was born 19966 days, 10 hours, 40 minutes ago.