we ask user for his zip code and currently we also ask for this time
zone (only US). It's a bit redundant, so I'd like to figure out user's
time zone based on his zip code.
The problem is that all services I've seen that provide such data,
provide only time offset and daylight savings flag for each zip code.
I'd rather have Rails time zone or anything that I can easily map to
Or maybe having offset and daylight saving time flag is enough to do
the mapping myself?