ganak.appDate & Time Calculators
16 calculators · Updated Apr 2026
Calculate the difference between two dates, add or subtract days, find the number of workdays in a range, or look up the day of the week for any date. Handy for project planning and scheduling.
Popular in Date & Time
Age Calculator
Calculate your exact age in years, months, weeks, and days from your birth date. Find total days lived, birthday countdown, zodiac sign, and generation.
Date Calculator
All-in-one date calculator: find differences between dates, add or subtract days/weeks/months/years, and count business days. Great for deadlines and planning.
Date Duration Calculator
Calculate exact duration between two dates in years, months, weeks, days, and hours. Perfect for age calculations, timelines, countdowns, and anniversaries.
All Date & Time Calculators
Add/Subtract Date Calculator
Add or subtract years, months, weeks, or days from any date. Calculate deadlines, expiration dates, and recurring events. Handles month-end edge cases.
Workdays Between Dates Calculator
Count business days between two dates, excluding weekends and holidays. Calculate project timelines, SLA deadlines, and payment terms. Custom holidays.
Business Days Calculator
Add business days to any date, skipping weekends and holidays. Calculate delivery dates, payment due dates, project deadlines, and SLA timelines.
Weekday Finder
Find the day of the week for any date in history or future. Shows day-of-year number, week number, and weekend status. Answer 'What day was I born?'
Week Number Calculator
Get the ISO 8601 week number for any date. Find which week of the year a date falls in, useful for reporting, payroll, and project tracking.
Birthday Calculator
Calculate your exact age with birthday countdown, zodiac sign, birth stone, Chinese zodiac, golden birthday, and life path number. Free and instant.
Days Calculator
Calculate days between two dates or add/subtract days from any date. Shows total days, weeks, months, weekdays, and weekend days. Inclusive/exclusive counting.
Hours Calculator
Calculate hours worked between any two times with break deduction. Weekly Timecard mode tracks daily shifts. Add hourly rate for gross pay and overtime.
Military Time Converter
Convert military time to standard time and back. Bidirectional 24-hour to 12-hour AM/PM converter with pronunciation and full conversion chart.
Time Zone Converter
Convert time between any two time zones with DST handling. See UTC offsets, time differences, and working hours overlap. Free, fast, and accurate.
Age Difference Calculator
Calculate the exact age difference between two people in years, months, days, weeks, and hours. Includes zodiac signs, generation labels, and fun facts.
Half Birthday Calculator
Calculate your exact half birthday date, quarter birthdays, zodiac sign comparison, and countdown. See your next 5 half birthdays with day of the week. Free and instant.
Epoch Converter
Free epoch converter. Convert Unix timestamps to human-readable dates and back. Supports seconds, milliseconds, timezones, and ISO 8601 format.
Why Use Date & Time Calculators?
Date math comes up more often than you would think — calculating deadlines, figuring out someone's exact age, counting business days for a project timeline, or finding what day of the week a future date falls on. These calculators handle leap years, month boundaries, and weekday/holiday logic so you don't have to.