test case: Simple addition (+1h)
time: 2020-01-01 02:00:00.000000000
value: '2020-01-01 03:00:00'
test case: Simple subtraction (-1h)
time: 2020-01-01 02:00:00.000000000
value: '2020-01-01 01:00:00'
test case: Simple addition (+1d)
time: 2020-01-01 02:00:00.000000000
value: '2020-01-02 02:00:00'
test case: Simple subtraction (-1d)
time: 2020-01-01 02:00:00.000000000
value: '2019-12-31 02:00:00'
test case: Simple addition (+1w)
time: 2020-01-01 02:00:00.000000000
value: '2020-01-08 02:00:00'
test case: Simple subtraction (-1w)
time: 2020-01-01 02:00:00.000000000
value: '2019-12-25 02:00:00'
test case: Simple addition (+1M)
time: 2020-01-01 02:00:00.000000000
value: '2020-02-01 02:00:00'
test case: Simple subtraction (-1M)
time: 2020-01-01 02:00:00.000000000
value: '2019-12-01 02:00:00'
test case: Simple addition (+1y)
time: 2020-01-01 02:00:00.000000000
value: '2021-01-01 02:00:00'