Day Counter

1. Count days between two dates: Enter any start and end date. The calculator instantly shows total days, business days (Monday through Friday), weekend days, and the breakdown in weeks plus days.
2. Days from today: Enter any number of days and get the exact calendar date that many days from now. Useful for deadlines, subscriptions, or project planning.
3. Days until a date: Enter a future (or past) date and see exactly how many days until (or since) that date. Great for countdowns to events, vacations, or due dates.

Total days between two dates is calculated by subtracting the earlier date from the later date and converting milliseconds to days:

Total days = (End date - Start date) / (1000 × 60 × 60 × 24)

Business days are counted by iterating through each day in the range and excluding Saturdays (day 6) and Sundays (day 0):

For each day from start to end:
  if day is not Saturday and not Sunday:
    business_days += 1

Example: Monday April 14 to Friday April 18, 2025:

• Total days: 4 (not counting start day, or 5 counting both endpoints)
• Business days: 5 (Mon, Tue, Wed, Thu, Fri)
• Weekend days: 0

Example: Friday April 11 to Monday April 14, 2025:

• Total days: 3
• Business days: 2 (Fri + Mon)
• Weekend days: 2 (Sat + Sun)