Daily percent changes are not based on exact dates. July $16$ in $2023$ is a Sunday, but July $16$ in $2022$ is a Saturday. Daily percent changes are based upon $\_\_\_\_\_\_\_\_\_\_\_.$ In other words, the same day of week last year with the closest date:

Sunday $07/16/2023$ is compared to Sunday $07/17/2022$

a$.$ Equivalent days

b$.$ Comparable days

c$.$ Similar days

d$.$ Analogous days