# DayCalcs

> DayCalcs (daycalcs.com) is a free website of date and time calculators: a day counter for the days between two dates, a date calculator that adds or subtracts days, weeks, months and years, business-day, age, hours, time, sleep, retirement, retirement date, full retirement age and 401(k) calculators, and live countdowns to US holidays, seasons and religious and cultural celebrations. Every calculation runs in the visitor's browser, in their own time zone. Nothing typed is stored.

How DayCalcs counts (use these rules when quoting results):
- Days between two dates = end date minus start date. The start day is not counted, matching how deadlines, notice periods and ages are counted. "Include end date" adds one day.
- Months are added on the calendar; if the day does not exist in the target month, the result is that month's last day (January 31 + 1 month = February 28, or 29 in a leap year).
- Business days are Monday to Friday. The optional holiday rule skips the 11 US federal holidays, moved to the observed weekday (Saturday holidays to Friday, Sunday holidays to Monday).
- Countdown and "days from today" pages are rebuilt every day just after midnight US Eastern Time and recalculated in the visitor's browser. Figures quoted here were correct on October 6, 2026.
- Seasons use U.S. Naval Observatory equinox and solstice dates in US Eastern Time. Islamic holidays follow the Umm al-Qura calendar and may differ by a day where moon sighting is used. Jewish holidays begin at sundown on the evening before the date shown.

## Calculators

- [Day Counter: Days Between Dates Calculator](https://daycalcs.com/): Free day counter and days calculator. Count the days between two dates, days until or since any date, business days, weeks and months, with a live countdown.
- [Date Calculator: Add or Subtract Days from a Date](https://daycalcs.com/date-calculator/): Free date calculator: add or subtract days, weeks, months and years from any date, with the weekday, week number, business days and a calendar.
- [Hours Calculator: Work Hours & Time Card Calculator](https://daycalcs.com/hours-calculator/): Free hours calculator and time card: hours between two times, a weekly timesheet with breaks, overtime and pay, in decimal or hours and minutes.
- [Time Calculator: Add Time & Time Duration Between Times](https://daycalcs.com/time-calculator/): Free time calculator: add or subtract hours, minutes and seconds, find the time between two times, or see what time it will be in X hours.
- [Age Calculator: How Old Am I in Years, Months and Days?](https://daycalcs.com/age-calculator/): Free age calculator: your exact age in years, months and days, total days and hours, the weekday you were born and a next-birthday countdown.
- [Sleep Calculator: Best Time to Sleep & Wake Up](https://daycalcs.com/sleep-calculator/): Free sleep calculator: find the best time to go to bed or wake up based on 90-minute sleep cycles, with time to fall asleep and recommended hours by age.
- [Retirement Calculator: How Much Do I Need to Retire?](https://daycalcs.com/retirement-calculator/): Free retirement calculator: how much you need to retire, what your savings will grow to, how long they will last, and the extra you need to save each month.
- [Retirement Date Calculator: When Can I Retire? (Countdown)](https://daycalcs.com/retirement-date-calculator/): Retirement date calculator: enter your birth date and retirement age to see the exact date you can retire, a live countdown, and key ages like 59½, 62, 65 and 70.
- [Full Retirement Age Calculator: What Is My Full Retirement Age?](https://daycalcs.com/full-retirement-age/): What is my full retirement age? Enter your birth date to get your exact Social Security full retirement age, the date you reach it, and your benefit at 62 vs 70.
- [401(k) Calculator with Employer Match](https://daycalcs.com/401k-calculator/): Free 401(k) calculator: see your balance at retirement with employer match, salary raises and investment growth, and how much match you might be missing.
- [Business Day Calculator: Add or Count Working Days](https://daycalcs.com/business-days-calculator/): Free business day calculator: add working days to a date or count business days between two dates, skipping weekends and US federal holidays.
- [How Many Days Until My Birthday? Birthday Countdown](https://daycalcs.com/birthday-countdown/): Birthday countdown and calculator: how many days until your birthday, the weekday it falls on, how old you will turn and a live countdown.

## Holiday and event countdowns

- [All countdowns](https://daycalcs.com/countdowns/): Every countdown on one page, sorted by date.
- [How Many Days Until Fourth of July 2027? Countdown](https://daycalcs.com/days-until-4th-of-july/): How many days till Fourth of July? 271 days until Independence Day (July 4) on Sunday, July 4, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Black Friday 2026? Countdown](https://daycalcs.com/days-until-black-friday/): How many days till Black Friday? 52 days until Black Friday on Friday, November 27, 2026. Live countdown, business days left and dates for the next 5 years.
- [Chinese New Year 2027: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-chinese-new-year/): How many days till Chinese New Year? 123 days until Chinese New Year (Lunar New Year) on Saturday, February 6, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Christmas Eve 2026? Countdown](https://daycalcs.com/days-until-christmas-eve/): How many days till Christmas Eve? 79 days until Christmas Eve on Thursday, December 24, 2026. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Christmas 2026? Countdown](https://daycalcs.com/days-until-christmas/): How many days till Christmas? 80 days until Christmas Day on Friday, December 25, 2026. Live countdown, business days left and dates for the next 5 years.
- [Diwali 2026: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-diwali/): How many days till Diwali? 33 days until Diwali (Lakshmi Puja) on Sunday, November 8, 2026. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Easter 2027? Countdown](https://daycalcs.com/days-until-easter/): How many days till Easter? 173 days until Easter Sunday on Sunday, March 28, 2027. Live countdown, business days left and dates for the next 5 years.
- [Eid al-Adha 2027: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-eid-al-adha/): How many days till Eid al-Adha? 222 days until Eid al-Adha on Sunday, May 16, 2027. Live countdown, business days left and dates for the next 5 years.
- [Eid al-Fitr 2027: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-eid-al-fitr/): How many days till Eid al-Fitr? 154 days until Eid al-Fitr on Tuesday, March 9, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Election Day 2026? Countdown](https://daycalcs.com/days-until-election-day/): How many days till Election Day? 28 days until Election Day on Tuesday, November 3, 2026. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Fall 2027? Countdown](https://daycalcs.com/days-until-fall/): How many days till Fall? 352 days until the first day of fall on Thursday, September 23, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Father's Day 2027? Countdown](https://daycalcs.com/days-until-fathers-day/): How many days till Father's Day? 257 days until Father's Day on Sunday, June 20, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Halloween 2026? Countdown](https://daycalcs.com/days-until-halloween/): How many days till Halloween? 25 days until Halloween on Saturday, October 31, 2026. Live countdown, business days left and dates for the next 5 years.
- [Hanukkah 2026: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-hanukkah/): How many days till Hanukkah? 60 days until Hanukkah on Saturday, December 5, 2026. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Labor Day 2027? Countdown](https://daycalcs.com/days-until-labor-day/): How many days till Labor Day? 335 days until Labor Day on Monday, September 6, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Mardi Gras 2027? Countdown](https://daycalcs.com/days-until-mardi-gras/): How many days till Mardi Gras? 126 days until Mardi Gras (Fat Tuesday) on Tuesday, February 9, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Memorial Day 2027? Countdown](https://daycalcs.com/days-until-memorial-day/): How many days till Memorial Day? 237 days until Memorial Day on Monday, May 31, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Mother's Day 2027? Countdown](https://daycalcs.com/days-until-mothers-day/): How many days till Mother's Day? 215 days until Mother's Day on Sunday, May 9, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until New Year's Day 2027? Countdown](https://daycalcs.com/days-until-new-year/): How many days till New Year's Day? 87 days until New Year's Day on Friday, January 1, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until New Year's Eve 2026? Countdown](https://daycalcs.com/days-until-new-years-eve/): How many days till New Year's Eve? 86 days until New Year's Eve on Thursday, December 31, 2026. Live countdown, business days left and dates for the next 5 years.
- [Passover 2027: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-passover/): How many days till Passover? 198 days until the first day of Passover on Thursday, April 22, 2027. Live countdown, business days left and dates for the next 5 years.
- [Ramadan 2027: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-ramadan/): How many days till Ramadan? 125 days until the first day of Ramadan on Monday, February 8, 2027. Live countdown, business days left and dates for the next 5 years.
- [Rosh Hashanah 2027: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-rosh-hashanah/): How many days till Rosh Hashanah? 361 days until Rosh Hashanah on Saturday, October 2, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Spring 2027? Countdown](https://daycalcs.com/days-until-spring/): How many days till Spring? 165 days until the first day of spring on Saturday, March 20, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until St. Patrick's Day 2027? Countdown](https://daycalcs.com/days-until-st-patricks-day/): How many days till St. Patrick's Day? 162 days until St. Patrick's Day on Wednesday, March 17, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Summer 2027? Countdown](https://daycalcs.com/days-until-summer/): How many days till Summer? 258 days until the first day of summer on Monday, June 21, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Thanksgiving 2026? Countdown](https://daycalcs.com/days-until-thanksgiving/): How many days till Thanksgiving? 51 days until Thanksgiving Day on Thursday, November 26, 2026. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Valentine's Day 2027? Countdown](https://daycalcs.com/days-until-valentines-day/): How many days till Valentine's Day? 131 days until Valentine's Day on Sunday, February 14, 2027. Live countdown, business days left and dates for the next 5 years.
- [How Many Days Until Winter 2026? Countdown](https://daycalcs.com/days-until-winter/): How many days till Winter? 76 days until the first day of winter on Monday, December 21, 2026. Live countdown, business days left and dates for the next 5 years.
- [Yom Kippur 2027: Date & How Many Days Until (Countdown)](https://daycalcs.com/days-until-yom-kippur/): How many days till Yom Kippur? 370 days until Yom Kippur on Monday, October 11, 2027. Live countdown, business days left and dates for the next 5 years.

## Days from today and days ago

- [2 Weeks From Today: What Date Will It Be?](https://daycalcs.com/2-weeks-from-today/): 2 weeks from today is Tuesday, October 20, 2026. See the weekday, business days, a calendar view and a calculator for any number of weeks.
- [3 Months From Today: What Date Will It Be?](https://daycalcs.com/3-months-from-today/): 3 months from today is Wednesday, January 6, 2027. See the weekday, business days, a calendar view and a calculator for any number of months.
- [4 Weeks From Today: What Date Will It Be?](https://daycalcs.com/4-weeks-from-today/): 4 weeks from today is Tuesday, November 3, 2026. See the weekday, business days, a calendar view and a calculator for any number of weeks.
- [6 Months Ago: What Date Was It?](https://daycalcs.com/6-months-ago/): 6 months ago was Monday, April 6, 2026. See the weekday, business days, a calendar view and a calculator for any number of months.
- [6 Months From Today: What Date Will It Be?](https://daycalcs.com/6-months-from-today/): 6 months from today is Tuesday, April 6, 2027. See the weekday, business days, a calendar view and a calculator for any number of months.
- [10 Weeks From Today: What Date Will It Be?](https://daycalcs.com/10-weeks-from-today/): 10 weeks from today is Tuesday, December 15, 2026. See the weekday, business days, a calendar view and a calculator for any number of weeks.
- [15 Days From Today: What Date Will It Be?](https://daycalcs.com/15-days-from-today/): 15 days from today is Wednesday, October 21, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [21 Days From Today: What Date Will It Be?](https://daycalcs.com/21-days-from-today/): 21 days from today is Tuesday, October 27, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [30 Days Ago: What Date Was It?](https://daycalcs.com/30-days-ago/): 30 days ago was Sunday, September 6, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [30 Days From Today: What Date Will It Be?](https://daycalcs.com/30-days-from-today/): 30 days from today is Thursday, November 5, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [45 Days Ago: What Date Was It?](https://daycalcs.com/45-days-ago/): 45 days ago was Saturday, August 22, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [45 Days From Today: What Date Will It Be?](https://daycalcs.com/45-days-from-today/): 45 days from today is Friday, November 20, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [60 Days Ago: What Date Was It?](https://daycalcs.com/60-days-ago/): 60 days ago was Friday, August 7, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [60 Days From Today: What Date Will It Be?](https://daycalcs.com/60-days-from-today/): 60 days from today is Saturday, December 5, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [75 Days From Today: What Date Will It Be?](https://daycalcs.com/75-days-from-today/): 75 days from today is Sunday, December 20, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [90 Days Ago: What Date Was It?](https://daycalcs.com/90-days-ago/): 90 days ago was Wednesday, July 8, 2026. See the weekday, business days, a calendar view and a calculator for any number of days.
- [90 Days From Today: What Date Will It Be?](https://daycalcs.com/90-days-from-today/): 90 days from today is Monday, January 4, 2027. See the weekday, business days, a calendar view and a calculator for any number of days.
- [100 Days From Today: What Date Will It Be?](https://daycalcs.com/100-days-from-today/): 100 days from today is Thursday, January 14, 2027. See the weekday, business days, a calendar view and a calculator for any number of days.

## About

- [About DayCalcs: How Our Date Calculators Work](https://daycalcs.com/about/): Who makes DayCalcs, how its date, time and countdown calculators count days, which sources they use for holidays and seasons, and how to report a mistake.
- [Contact DayCalcs](https://daycalcs.com/contact/): Contact DayCalcs to report a wrong date or result, suggest a new date or time calculator, ask about embedding a countdown, or ask a question.
- [Privacy Policy](https://daycalcs.com/privacy/): How DayCalcs handles your data: calculations run in your browser, what Google Analytics measures, the cookies it sets, and how to opt out.

## Optional

- [Full text of every page](https://daycalcs.com/llms-full.txt): Answers, explanations, worked examples and FAQs from all pages in plain text.