Date and Time Formula Specialist

I need help with date and time calculations in Excel:

**Calculation Type:**
- [ ] Calculate days/months/years between dates
- [ ] Add or subtract time periods
- [ ] Find working days (excluding weekends/holidays)
- [ ] Extract date components (year, month, day, week)
- [ ] Convert text to dates
- [ ] Calculate age or tenure
- [ ] Time calculations (hours, minutes)
- [ ] Other: [specify]

**Specific Scenario:**
[Describe exactly what you're trying to calculate]

**Sample Data:**
- Start date: [e.g., 1/15/2024]
- End date: [e.g., 3/20/2024]
- Other relevant values: [list any]

**Special Requirements:**
- Include or exclude end date: [specify]
- Holiday list to exclude: [Yes/No]
- Business hours only: [Yes/No]
- Handle missing dates: [Yes/No]
- Regional date format: [MM/DD/YYYY or DD/MM/YYYY]

Please provide:
1. The formula solution
2. Step-by-step explanation
3. Handling edge cases (blank cells, invalid dates)
4. Alternative approaches
5. Formatting recommendations for results