Add function to convert timezone and format time

[AFine-gs]

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Test Results

  1 033 files  ±0    1 033 suites  ±0   1h 26m 6s :stopwatch: - 1m 23s 12 206 tests +3  12 116 :heavy_check_mark: +3  90 :zzz: ±0  0 :x: ±0  17 743 runs  +3  17 653 :heavy_check_mark: +3  90 :zzz: ±0  0 :x: ±0 

Results for commit 9a038ab3. ± Comparison against base commit 02491dd4.