ganak.appDate & Time Calculators
8 calculators · Updated Feb 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.
Age calculation with years, months, and days breakdown · Business days and workday counting between dates · Add/subtract days, weeks, or months from any date
Popular in Date & Time
Age Calculator
Calculate your exact age in years, months, weeks, and days from your birth date. Find total days lived, upcoming birthday countdown, zodiac sign, and generation. Perfect for birthday celebrations, age verification, retirement planning, and milestone tracking. Supports past and future date calculations.
Date Calculator
All-in-one date calculator for finding differences between dates, adding or subtracting days/weeks/months/years, and counting business days. Features duration calculator, workday counter, date arithmetic, and week number finder. Essential for project planning, deadline tracking, event scheduling, and contract calculations.
Date Duration Calculator
Calculate the exact duration between two dates with precision down to hours and minutes. Find years, months, weeks, days, hours, and total time elapsed. Perfect for age calculations, project timelines, event countdowns, pregnancy due dates, and anniversary tracking. Supports timezone-aware calculations.
All Date & Time Calculators
Add/Subtract Date Calculator
Add or subtract years, months, weeks, or days from any starting date. Calculate future deadlines, expiration dates, delivery schedules, and recurring events. Essential for contract end dates, subscription renewals, project milestones, and financial maturity dates. Handles month-end edge cases correctly.
Workdays Between Dates Calculator
Count business days (working days) between two dates, excluding weekends and holidays. Calculate project timelines, SLA deadlines, delivery estimates, and payment terms. Essential for HR leave calculations, legal deadlines, shipping estimates, and business contract compliance. Supports custom holiday calendars.
Business Days Calculator
Add a specific number of business days to any date, automatically skipping weekends and holidays. Calculate delivery dates, payment due dates, project deadlines, and service level agreements. Essential for shipping estimates, legal filings, HR processes, and business operations planning.
Weekday Finder
Find the day of the week (Monday-Sunday) for any date in history or future. Also shows day-of-year number (1-365/366), week number, and whether it falls on a weekend. Perfect for historical research, event planning, scheduling, and answering 'What day was I born?' questions.
Week Number Calculator
Get the ISO 8601 week number for any date, following international standard week numbering. Find which week of the year a date falls in, useful for weekly reporting, payroll processing, project tracking, and manufacturing schedules. Includes year-week format (e.g., 2024-W15).
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.