This was originally made by NationalAtlas.gov (US Federal Government, thus public domain) but it had some "trade marked" logos and other things on it that made it impossible to use here on Openclipart.org even though it was public domain. I edited those out and I'm uploading my edited "no logos" version here for anyone who needs a map of timezones!
美國時區
America、chart、class、clock、diagram、government、hour、map、project、school、time、time zones、USA
美國、圖表、類、時鐘、圖、政府、小時、地圖、項目、學校、時間、時區、美國
資料來源：openclipart ( https://openclipart.org/ )