About Days Until Calc
Days Until Calc is a free public tool. It does one thing well: it tells you how many days until any date.
The site has five calculators and 20 live holiday countdown pages. Every tool runs in your browser. Nothing you enter is saved, sent, or stored anywhere on a server.
Built by GSD Local Marketing
Days Until Calc is owned and operated by GSD Local Marketing, headquartered in East Wenatchee, Washington. GSD Local Marketing builds and publishes free utility websites that answer common questions fast.
The founder is Daniel Terry, a US Army veteran. The GSD ethos shapes every site: Get Stuff Done. No popups asking for your email. No fake countdown timers selling fake urgency. No data harvesting. Just clean tools that give you the answer you came for.
This site was built because date countdown searches dominate Google in measurable ways. "How many days until Christmas" gets over 5 million US searches in December alone. "Days between dates" gets approximately 600,000 searches per month year-round. The answers should be free, instant, and accurate.
What This Site Does
Five date calculators, each with a dedicated page:
- Days Until a Date. Pick any future date. See the live countdown.
- Days Between Dates. Pick two dates. Get the exact number of calendar days separating them.
- Exact Age Calculator. Enter a birthdate. See age in years, months, weeks, days, hours, and minutes.
- Business Days Calculator. Count only Monday through Friday between two dates. Skips weekends and all 11 US federal holidays automatically.
- Day of Week Calculator. Enter any date and instantly see what day of the week it falls on. Works for any date from October 1582 (start of the Gregorian calendar) through the year 9999.
Plus 20 holiday countdown pages tracking Christmas, Halloween, Thanksgiving, New Year's Day, New Year's Eve, Valentine's Day, St. Patrick's Day, Easter, Mother's Day, Father's Day, Independence Day, Labor Day, Memorial Day, Veterans Day, Black Friday, Tax Day, Cinco de Mayo, the Super Bowl, MLK Day, and Presidents Day.
How the Calculators Work
Every calculator uses JavaScript date math running entirely in your browser. There is no server call when you enter a date. There is no database storing your inputs.
Leap years are handled automatically through standard date logic. The Gregorian calendar rule says a year is a leap year if it is divisible by 4, except for years divisible by 100, which must also be divisible by 400. The year 2024 was a leap year. The year 2100 will not be (divisible by 100 but not by 400). The year 2400 will be (divisible by 400).
Federal holidays in the Business Days Calculator follow the 11 official US federal holidays. When a holiday falls on a Saturday, the federal observance shifts to the preceding Friday. When it falls on a Sunday, it shifts to the following Monday. The calculator accounts for these shifts.
Floating holiday calculations follow official US rules. Memorial Day is always the last Monday of May. Labor Day is the first Monday of September. Thanksgiving is the fourth Thursday of November. Easter follows the Western Christian Paschal formula.
Our Data Commitment
We do not collect your dates. We do not store your inputs. We do not sell your data.
All calculations happen in your browser using JavaScript. When you close the tab, the data is gone. We cannot retrieve it. We never could.
We use Google Analytics 4 to track anonymous site traffic: how many visitors, which pages, which devices. That data is aggregated and contains no personally identifiable information. We run display ads through standard ad networks (Google AdSense, Ezoic, Mediavine). Those networks may use cookies for ad personalization. You can opt out through your browser settings or through the ad network's preference page.
Why Trust These Numbers
Every calculator on this site has been tested against known reference points before publication. The Day of Week Calculator returns the correct day for July 4, 1776 (Thursday), the moon landing on July 20, 1969 (Sunday), and January 1, 2000 (Saturday). The Age Calculator returns 122 years, 164 days for the lifespan of Jeanne Calment of France, the longest verified human lifespan.
If you ever find an error in any calculation, email us. We will fix it the same day.
Contact
GSD Local Marketing
East Wenatchee, Washington
Email: [email protected]
Web: https://gsdlocalmarketing.com