# AskTheDate

> Fast, shareable answers to date and time questions. Every calculation lives at its own URL ("the URL is the UI"): change the URL, change the calculation. 72 time zones, 6 languages (en, es, fr, de, zh, ja), no account required.

Canonical URL pattern: https://askthedate.com/{IANA-timezone}/{locale}/{tool}/{params}/
Canonical English pages use the America/New_York timezone. Dates in URLs are ISO (YYYY-MM-DD).

## Core tools

- [What day is today](https://askthedate.com/America/New_York/en/what-day-is-today/): Day of week, week number, day of year for today
- [Days between dates](https://askthedate.com/America/New_York/en/days-between/today/and/2026-12-25/): Count days between any two dates
- [Add days to a date](https://askthedate.com/America/New_York/en/add-30-days-to-today/): What date will it be N days from today
- [Working days calculator](https://askthedate.com/America/New_York/en/working-days-until-year-end/): Business days between dates (weekends excluded)
- [Age calculator](https://askthedate.com/America/New_York/en/age-calculator/from/1990-01-01/): Exact age in years, months, days
- [Leap year checker](https://askthedate.com/America/New_York/en/leap-year/2028/): Is any year a leap year
- [Week number](https://askthedate.com/America/New_York/en/what-week-number-is-today/): ISO 8601 week number for any date
- [Current time](https://askthedate.com/America/New_York/en/time/): Live clock for any of 72 cities/time zones
- [Timezone converter](https://askthedate.com/America/New_York/en/timezone-converter/): Convert times between zones
- [Countdown](https://askthedate.com/America/New_York/en/countdown-to-christmas/): Live countdown to any date and time
- [Holiday calendar](https://askthedate.com/America/New_York/en/holidays/2026/): US federal holidays and major observances for any year, with weekdays, observed dates and live countdowns
- [Day of week for a date](https://askthedate.com/America/New_York/en/day-of-week/for/2026-07-04/): Which weekday any given date falls on
- [Quarter finder](https://askthedate.com/America/New_York/en/what-quarter-is-today/): Which fiscal/calendar quarter a date is in, with progress through it
- [Anniversary calculator](https://askthedate.com/America/New_York/en/anniversary/for/2020-01-01/): Years elapsed since a date plus upcoming milestone dates
- [Pregnancy due date](https://askthedate.com/America/New_York/en/pregnancy-due-date/from/2026-01-01/): Estimated due date and week-by-week progress from the last menstrual period (educational, not medical advice)
- [Roman numeral dates](https://askthedate.com/America/New_York/en/roman-numeral/for/2026-01-01/): Any date written in Roman numerals, with the components broken down
- [Date range generator](https://askthedate.com/America/New_York/en/date-range-generator/): Generate a list of dates between two endpoints at a chosen interval

## Earnings calendar

- [US earnings calendar](https://askthedate.com/America/New_York/en/earnings-calendar/week/): Weekly/monthly/annual US earnings dates with estimated and actual EPS, report timing (before/after market), and market cap. Data aggregated from TradingView with Yahoo Finance fallback, refreshed several times daily. Informational only, not investment advice.

## Health reference

- [Newborn jaundice monitor](https://askthedate.com/America/New_York/en/newborn-jaundice-monitor/): Educational reference plotting transcutaneous bilirubin (TcB) values against published hour-specific nomograms (Bhutani 1999; AAP 2022 guideline). Not medical advice.

## Guides

- [All guides](https://askthedate.com/guides/): Hand-written explainers behind the calculators (RSS: https://askthedate.com/guides/feed.xml; also in es/fr/de/zh/ja at /guides/{locale}/)
- [How working days are counted](https://askthedate.com/guides/how-working-days-are-counted/)
- [ISO week numbers explained](https://askthedate.com/guides/iso-week-numbers-explained/)
- [Leap year rules](https://askthedate.com/guides/leap-year-rules/)
- [Daylight saving time and date math](https://askthedate.com/guides/daylight-saving-time-and-date-math/)
- [Time zones and the IANA database](https://askthedate.com/guides/timezones-and-the-iana-database/)
- [How age is calculated around the world](https://askthedate.com/guides/how-age-is-calculated/)
- [How to read an earnings calendar](https://askthedate.com/guides/how-to-read-an-earnings-calendar/)
- [EPS and earnings estimates](https://askthedate.com/guides/eps-and-earnings-estimates/)
- [Understanding newborn jaundice numbers](https://askthedate.com/guides/understanding-newborn-jaundice-numbers/)
- [Counting days between dates](https://askthedate.com/guides/date-difference-pitfalls/)

## About

- [About](https://askthedate.com/about/): Methodology and data sources
- [Contact](https://askthedate.com/contact/): duanjl.china@gmail.com