In [1]: import pendulum

In [2]: pendulum.parse("2020-01-01").week_of_month
Out[2]: 1

In [3]: pendulum.parse("2020-01-07").week_of_month
Out[3]: 1  ==>should be 2

In [4]: pendulum.parse("2020-01-14").week_of_month
Out[4]: 2 ==>should be 3