I am looking for assistance to convert a set of data in a spreadsheet that is arranged in columns going across by month and day in a calendar format. The month is a row above the day of the month.
I have tried a couple of different approaches, but there is likely a much easier way with fewer steps. If anyone can help with this, I would be greatly appreciate it. Thank you.
Below is a screen shot of how the data set is arranged.

The desired result is to have the values for each record corresponding to each date. A sample of the results for Entity1 would be something like the following:
| Entity | Date | Value |
| Entity1 | 2020-01-01 | |
| Entity1 | 2020-01-02 | 1 |
| Entity1 | 2020-01-03 | 1 |
| Entity1 | 2020-01-04 | 1 |
| Entity1 | 2020-01-05 | 1 |
| Entity1 | 2020-01-06 | |
| Entity1 | 2020-01-07 | |
| Entity1 | 2020-01-08 | 1 |
| Entity1 | 2020-01-09 | 1 |
| Entity1 | 2020-01-10 | 1 |
| Entity1 | 2020-01-11 | |
| Entity1 | 2020-01-12 | |
| Entity1 | 2020-01-13 | |
| Entity1 | 2020-01-14 | |
| Entity1 | 2020-01-15 | |
| Entity1 | 2020-01-16 | |
| Entity1 | 2020-01-17 | |
| Entity1 | 2020-01-18 | |
| Entity1 | 2020-01-19 | |
| Entity1 | 2020-01-20 | |
| Entity1 | 2020-01-21 | |
| Entity1 | 2020-01-22 | |
| Entity1 | 2020-01-23 | |
| Entity1 | 2020-01-24 | |
| Entity1 | 2020-01-25 | |
| Entity1 | 2020-01-26 | |
| Entity1 | 2020-01-27 | |
| Entity1 | 2020-01-28 | |
| Entity1 | 2020-01-29 | |
| Entity1 | 2020-01-30 | |
| Entity1 | 2020-01-31 | |
| Entity1 | 2020-02-01 | |
| Entity1 | 2020-02-02 | |
| Entity1 | 2020-02-03 | |
| Entity1 | 2020-02-04 | |
| Entity1 | 2020-02-05 | |
| Entity1 | 2020-02-06 | |
| Entity1 | 2020-02-07 | 1 |
| Entity1 | 2020-02-08 | 1 |
| Entity1 | 2020-02-09 | 1 |
| Entity1 | 2020-02-10 | |