Error in validating Format

**Returing False Format**

dayjs("March-2021", "MMMM-YYYY",true).isValid() --> False

dayjs("10:00:00 AM", "hh:mm:ss A",true).isValid() --> False

dayjs("March-2021", "MMMM-YYYY").isValid() --> True

dayjs("10:00:00 AM", "hh:mm:ss A").isValid() --> True

**Why with strict format it is giving False as Output, How to Correct the Syntax to Receive True as Output?**

Start by reproducing the four dayjs parsing examples from the issue and compare the strict and non-strict results. Trace the format-validation entry point used by isValid() and determine whether the reported strict results are expected; done means documenting the cause and confirming the correct behavior or a focused fix with regression coverage.

Written by the indexing model from the issue text.