Excel calculate first of month

- Excel calculate first day of month
- Excel calculate first monday of month
- Excel calculate first thursday of month
- Excel calculate first day of month from date
- Excel calculate first friday of month
- Excel calculate first sunday of month
- Excel calculate first tuesday of month
- Excel calculate first working day of month
- Excel calculate first day of next month
- Excel formula to calculate first day of month
- Excel formula to calculate first day of next month
- Excel formula to calculate first day of the current month