implement Time basics #866

Job	Run time
test (ubuntu-latest, 2.7, 1.61)	9m 33s
test (ubuntu-latest, 2.7, stable)	5m 8s
test (ubuntu-latest, 3.0, 1.61)	9m 26s
test (ubuntu-latest, 3.0, stable)	5m 58s
test (ubuntu-latest, 3.1, 1.61)	12m 21s
test (ubuntu-latest, 3.1, stable)	6m 29s
test (ubuntu-latest, 3.2, 1.61)	9m 58s
test (ubuntu-latest, 3.2, stable)	7m 28s
test (ubuntu-latest, head, 1.61)	8m 3s
test (ubuntu-latest, head, stable)	4m 13s
test (macos-latest, 2.7, 1.61)	12m 48s
test (macos-latest, 2.7, stable)	6m 37s
test (macos-latest, 3.0, 1.61)	13m 30s
test (macos-latest, 3.0, stable)	6m 16s
test (macos-latest, 3.1, 1.61)	13m 39s
test (macos-latest, 3.1, stable)	6m 16s
test (macos-latest, 3.2, 1.61)	11m 28s
test (macos-latest, 3.2, stable)	6m 25s
test (macos-latest, head, 1.61)	11m 11s
test (macos-latest, head, stable)	5m 13s
test (windows-latest, 2.7, 1.61)	21m 27s
test (windows-latest, 2.7, stable)	11m 20s
test (windows-latest, 3.0, 1.61)	21m 42s
test (windows-latest, 3.0, stable)	13m 49s
test (windows-latest, 3.1, 1.61)	23m 3s
test (windows-latest, 3.1, stable)	12m 42s
test (windows-latest, 3.2, 1.61)	19m 50s
test (windows-latest, 3.2, stable)	11m 6s
test (windows-latest, mswin, stable)	10m 54s
	5h 17m 53s

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