حاسبة العد التنازلي للإجازة

مبادئ الحساب والصيغة الرياضية

Vacation Countdown Calculation Formulas:

1. Days Until Vacation:
   Days Remaining = Floor of (Departure Date - Current Date) in days

2. Working Days:
   - If Include Weekends is true: Working Days = Days Remaining
   - If false: Working Days = Count of weekdays (Monday through Friday) between current date and departure date

3. Sleeps Remaining:
   Sleeps = Days Remaining + (1 if current time is before 10 PM, else 0)

4. Vacation Length:
   Length = (Return Date - Departure Date) in days + 1

5. Countdown Progress:
   Progress % = Max(0, Min(100, ((30 - Days Remaining) / 30) * 100))  (assuming a 30-day preparation window)