By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
| InputDate | FirstMonday |
|---|---|
| 2016-01-08 | 2016-01-04 |
| 2017-05-05 | 2017-01-02 |
| 2018-04-05 | 2018-01-01 |
| 2019-03-03 | 2018-12-31 |
| 2020-04-03 | 2019-12-30 |
| 2021-05-06 | 2021-01-04 |
| InputDate | FirstMonday |
|---|---|
| 2016-01-08 | 2016-01-04 |
| 2017-05-05 | 2017-01-02 |
| 2018-04-05 | 2018-01-01 |
| 2019-03-03 | 2018-12-31 |
| 2020-04-03 | 2019-12-30 |
| 2021-05-06 | 2021-01-04 |