The best replacement for timezone is time zone.

The best alternatives to timezone are rated as following:
★★★★★  time zone
★★  timezoneinfo

Your alternative for timezone is not listed? Suggest!
Speaking about timezone, one probably shouldn't forget about timestamp.

Other search terms related to timezone and their ratings are:
★★★★★ timestamp
★★★ datetime
You have in mind a companion for timezone and it is not yet here? Propose!



Google Trends

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timezone
time zone
timezoneinfo