Find the Day of the Week
Name the weekday for each calendar date you paste in. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Find the Day of the Week
- 1. Paste your dates. Paste one calendar date per line into the input pane, such as 2026-07-14. Each line is processed independently against the calendar.
- 2. Read the weekday. The tool works out the weekday for each date using the Gregorian calendar rules, correctly handling dates far in the past or future.
- 3. Copy the results. Copy the list of weekday names from the output pane. Each line matches the date in the same position from your input.
When to use Find the Day of the Week
Find the Day of the Week names the weekday for any calendar date, past or future, without needing to count on a physical calendar or remember a doomsday algorithm. It is a quick lookup for anyone who has a date but not the day it fell on.
- Confirming a historical event. You know a document was signed on 1969-07-20 but not what day of the week that was, and pasting the date in gives you Sunday instantly.
- Planning a future event. You are booking a venue for 2027-03-15 and need to know what weekday that lands on before confirming whether it works with a weekday-only rental policy.
- Validating a data import. A spreadsheet of dates was imported without a weekday column, and running the whole list through this tool fills in the missing weekday for each row.
- Checking a recurring pattern. You want to confirm that a series of dates pulled from a report all actually fall on a Monday as expected, and pasting them in verifies each one.
Examples
A single date
Input
2026-07-14
Output
Tuesday
Several dates at once
Input
2000-01-01 1969-07-20
Output
Saturday Sunday
About the Find the Day of the Week tool
Find the Day of the Week runs as plain JavaScript in your browser tab, with no server behind it. Name the weekday for each calendar date you paste in. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Time Tools section, 90 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
There is nothing to configure. Provide the input and the result appears on its own. 2 worked examples further down the page show exactly what the tool produces for real inputs.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Does Find the Day of the Week cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.
Related tools
All Time Tools →Find the Day of the Year
Find the ordinal day number (1-366) within the year for each calendar date.
Find the Week of the Year
Find the ISO-8601 week number (weeks start Monday) for each calendar date.
Find the Difference Between Dates
Count the days between two calendar dates on each line (also shown broken down into years, months and days).
Format a Calendar Date
Reformat each calendar date using tokens like YYYY, MM, DD, MMMM and dddd.