Date Difference Calculator
Calculate the exact time between two dates in days, weeks, months, years, hours, and minutes. Perfect for countdowns, project planning, and tracking milestones.
Select Dates
Time Between Dates
100 days
From January 1, 2025 to April 11, 2025
0
Years
3
Months
14
Weeks
100
Days
Exact Breakdown
3 months and 10 days
Alternative Views
2,400 hours
144,000 minutes
8,640,000 seconds
71 work days (Mon-Fri)
Time Breakdown
Add or Subtract Days
Use negative for subtract
February 21, 2025
Common Date Ranges
Notice Periods
- 1 week notice = 7 days
- 2 weeks notice = 14 days
- 4 weeks notice = 28 days
- 1 month notice = ~30 days
Pregnancy Milestones
- First trimester = 84 days
- Second trimester = 98 days
- Full term = 280 days (40 weeks)
Financial Periods
- Quarter = ~91 days
- Half year = ~182 days
- Australian FY = Jul 1 - Jun 30
Understanding Date Calculations
Calculating the difference between dates involves understanding calendar complexities like varying month lengths (28-31 days), leap years (366 days), and the distinction between calendar days and business days.
Leap Year Rules
- • Years divisible by 4 are leap years
- • Except years divisible by 100 (not leap years)
- • Unless also divisible by 400 (leap years)
- • 2024 is a leap year (Feb has 29 days)
- • 2100 will NOT be a leap year
Days per Month
- • 31 days: Jan, Mar, May, Jul, Aug, Oct, Dec
- • 30 days: Apr, Jun, Sep, Nov
- • 28/29 days: February
- • Average month: 30.44 days
- • Average year: 365.25 days
Frequently Asked Questions
Should I include the end date when counting days? ▼
It depends on the context. For "days until" calculations (like days until your birthday), typically you
don't include today. For "days between" calculations (like duration of a rental period), you usually
include both the start and end dates. Our calculator lets you toggle this setting.
What is EOFY and why is it important in Australia? ▼
EOFY stands for End of Financial Year, which is 30 June in Australia. It's important for tax planning,
business reporting, superannuation contributions, and annual leave calculations. Many Australians use
date calculators to determine how many days until EOFY for tax-deductible purchases or super contributions.
How are work days calculated? ▼
Work days (or business days) typically exclude weekends (Saturday and Sunday). In Australia, they also
should exclude public holidays, though these vary by state. Our calculator excludes weekends but doesn't
account for public holidays automatically - you'll need to subtract these manually for precise business
day calculations.
How do I calculate my long service leave eligibility date? ▼
Long service leave in Australia typically requires 10 years of continuous service (though this varies by
state and industry). Use our "Add/Subtract Days" feature: enter your employment start date, add 3,650 days
(10 years), and the result shows your LSL eligibility date. Remember to check your specific state's
requirements as some allow pro-rata access after 7 years.