Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Find out which day of the week any date falls on.
Saturday
This tool looks up which day of the week any date -- past, present, or far into the future -- falls on. It's a common curiosity ("what day was I born?") and a practical planning check ("is this date a weekday or weekend?").
Enter any date. The result shows the full weekday name and whether it's a weekday or weekend.
The calculation uses the standard Gregorian calendar (the calendar in civil use worldwide since its adoption), which correctly and unambiguously determines the weekday for any valid date without needing a separate algorithm like Zeller's congruence.
July 4, 2026 falls on a Saturday.
To find the Nth occurrence of a specific weekday in a month (e.g. "the 2nd Tuesday"), use the Event Date Calculator. For the ISO week number of a date, see the Week Number Calculator.
Pick the date with the date field, then read the result. You get the full weekday name, a short form such as Sat, and a flag showing whether the date is a Saturday or Sunday. The calculation treats the date as a plain calendar date, so your own time zone or daylight saving setting cannot shift the answer by a day. That matters, because a date near midnight can otherwise show up as the wrong weekday in tools that mix dates with clock times.
Suppose you want to know the weekday of a hypothetical wedding date, September 12, 2026. Enter it and the tool reports Saturday, flagged as a weekend. If you were choosing between that date and September 15, 2026, the second one comes back as a Tuesday, a weekday. Checking a few candidate dates one after another is the fastest way to pick a date that suits your guests, a venue that is closed on certain days, or a business deadline that must land on a working day.
The weekday name is the definitive answer for the date you entered. The weekend flag is a convenience for quick scanning. When you are planning around a deadline, remember that a date falling on a weekend often means the practical deadline is the Friday before or the Monday after, depending on the rules of whatever you are dealing with. Contracts, court filings, and tax deadlines each have their own rules for weekend deadlines, so confirm with the relevant official source or a professional rather than assuming.
Yes -- any date the browser's date engine can represent (many centuries in both directions) resolves correctly under the Gregorian calendar.
This tool assumes the proleptic Gregorian calendar (extending today's calendar rules backward), which may not match historical civil calendars used before each country's Gregorian adoption date.
Saturday and Sunday, the standard used in most Western countries -- some regions use a different weekend (e.g. Friday-Saturday), which this tool doesn't account for.
No. The tool works with the calendar date itself, not a moment in time, so the same date gives the same weekday for everyone regardless of their time zone.
No. It only reports the weekday and whether that day is a Saturday or Sunday. Check an official holiday calendar for your country or region separately.
Yes. Change the date and the result updates, so you can compare candidate dates one after another when choosing an event day.
Reference: U.S. Department of Labor