📅 Date & Time Calculators

🎂 Age Calculator Find your exact age in years, months and days, and the countdown to your next birthday. 📆 Date Difference Calculator Count the days, weeks and months between two dates. ⏳ Countdown Calculator Count down the days, hours and minutes to any date and time. ➕ Add or Subtract Days Calculator Add or subtract days, weeks, months or years from any date. 🗓️ Business Days Calculator Count the working days (weekdays) between two dates. 📇 Workdays From Date Calculator Find the date that is N business days before or after a start date. ⏰ Days Until Date Calculator Count how many days remain until a future date. 📅 How Many Days Since Calculator Count how many days have passed since a date in the past. #️⃣ Week Number Calculator Find the ISO week number and day of the year for any date. ⏱️ Time Duration Calculator Find the length of time between two clock times. 🕐 Hours Calculator Calculate hours worked between two times, with breaks and overtime. 🧾 Time Card Calculator Turn one or more work shifts and breaks into paid hours and pay. 🖥️ Unix Timestamp Converter Convert between a Unix epoch timestamp and a human date and time. 😴 Sleep Cycle Calculator Find the best times to go to sleep or wake up in whole sleep cycles. 📆 Day of the Week Calculator Find out what day of the week any date falls on, for past or future dates.