weekday()

Date & Time

weekday() is a MATLAB®-compatible date & time function for day-of-week index for a datetime. matlab convention: sunday=1, monday=2, ..., saturday=7. Run it online in your browser with SimLab — free, no install, no license required.

Day-of-week index for a datetime. MATLAB convention: Sunday=1, Monday=2, ..., Saturday=7.

▶ Try weekday() in SimLab — Free

Syntax

weekday(d)

Examples — run weekday() in your browser

w = weekday(datetime('2024-01-15'));  % 2 (Monday)

▶ Run

Limitations

Differs from ISO convention (Monday=1). MATLAB uses Sunday=1 throughout.

Frequently Asked Questions about weekday()

Is the weekday() function free to use in SimLab?

Yes. SimLab is 100% free — no signup, no license, and no usage limits. You can run weekday() and 510+ other MATLAB®-compatible functions directly in your browser at simulations4all.com/simlab.

Do I need to install MATLAB to use weekday()?

No. SimLab runs entirely in your web browser with zero installation. The weekday() function works without any MATLAB® license or software download.

What does weekday() do?

Day-of-week index for a datetime. MATLAB convention: Sunday=1, Monday=2, ..., Saturday=7. It is a MATLAB®-compatible date & time function available in SimLab with the same calling syntax as MATLAB® — typically: weekday(d).

Can I run weekday() in my browser?

Yes. Open SimLab at simulations4all.com/simlab, write or paste code that calls weekday(), and run it. Execution happens locally in your browser — no data leaves your machine.

Try SimLab — MATLAB®-compatible, free, in your browser

510+ functions. Runs in your browser. No install. No license.

Open SimLab

MATLAB® is a registered trademark of The MathWorks, Inc. SimLab is an independent project by Simulations4All and is not affiliated with, endorsed by, or sponsored by The MathWorks, Inc.