Complete Date & Time Calculator
Calculate future dates, past times, and various time conversions with our comprehensive calculator tools.
Future Date Calculators
3 Weeks from Today
Calculate what date falls 3 weeks after today’s date
5 Weeks from Today
Find the date 35 days in the future
9 Weeks from Today
See what date falls 63 days from now
14 Weeks from Today
Plan ahead with this 98-day future date calculator
24 Weeks from Today
(~6 months) Important for pregnancy tracking
30 Weeks from Today
(~7 months) Useful for project planning
40 Weeks from Today
Full-term pregnancy calculator (280 days)
270 Days from Today
(~9 months) Business and personal planning
Past Time Calculators
What time was it 5 hours ago?
Perfect for checking past events
What time was it 6 hours ago?
Useful for work shift tracking
What time was it 7 hours ago?
Calculate exact past times easily
What time was it 8 hours ago?
Standard workday lookback
What time was it 9 hours ago?
Helpful for international calls
What time was it 10 hours ago?
Track sleep or work patterns
What time was it 11 hours ago?
Business hour calculations
What time was it 12 hours ago?
AM/PM time converter
What time was it 13 hours ago?
Half-day time tracking
What time was it 14 hours ago?
Overnight shift calculator
What time was it 15 hours ago?
Full waking day lookback
What time was it 17 hours ago?
Near-full day calculations
What time was it 18 hours ago?
Dawn-to-dusk tracking
What time was it 19 hours ago?
Almost full day rewind
60 Days Ago from Today
(~2 months) Financial/billing lookback
9 Months Ago from Today
Pregnancy/baby milestone tracker
⏳ Quick Date & Time Calculators
Instantly calculate future dates, past times, and date differences with our comprehensive tools.
Future Date Calculators
3 Weeks from Today
Calculate events 21 days in the future
5 Weeks from Today
Plan for dates 35 days ahead
Past Time Calculators
What time was it 8 hours ago?
Track work shifts and sleep patterns
60 Days Ago from Today
Financial and billing lookback
📅 How Our Date Calculators Work
Our tools use precise JavaScript calculations to:
- Add/Subtract Time Units
- Days, weeks, months, and years
- Hours and minutes for exact time tracking
- Handle Complex Calendar Scenarios
- Month-end rollovers
- Leap years
- Daylight saving time adjustments
- Provide Multiple Formats
- Weekday names (Monday-Sunday)
- Month names (January-December)
- 12/24 hour time formats
🔢 Popular Calculations
Future Planning
- 40 weeks from today - Full pregnancy timeline (280 days)
- 270 days from today - Business project milestones
- 30 weeks from today - Academic semester planning
Past Reference
- What time was it 15 hours ago? - International call tracking
- 9 months ago from today - Baby development milestones
- 60 days ago from today - Invoice and payment tracking
📊 Conversion Tools
Time Conversions
| Hours Ago | Equivalent To | Common Uses |
|---|---|---|
| 8 hours | Standard work shift | Timecard verification |
| 12 hours | AM/PM flip | Medication schedules |
| 19 hours | Near full-day lookback | Travel jetlag calculation |
Date Conversions
| Period | Days | Business Uses |
|---|---|---|
| 2 weeks | 14 | Payroll cycles |
| 9 weeks | 63 | Quarterly planning |
| 24 weeks | 168 | Half-year project reviews |