Does Is Weekend upload my file or text to Tool-You servers?

No. Is Weekend runs in this browser tab. Files stay on the device. Limit note: Local calendar. Weekend = Sat or Sun.

Should I use Add Business Days instead of Is Weekend?

Use Is Weekend when you need Weekend flag plus weekday number and name. Use Add Business Days when you need Add weekdays only; shows result weekday. They share a category (Date & time) but not the same job.

Is Weekend

Weekend flag plus weekday number and name.

Flags Saturday/Sunday, prints Sunday-based 0–6, and a short English weekday name. Unlike Weekday Name this is primarily a weekend check. Invalid dates fail.

What Is Weekend does

Flags Saturday/Sunday, prints Sunday-based 0–6, and a short English weekday name. Unlike Weekday Name this is primarily a weekend check. Invalid dates fail.

Is Weekend sits in the Date & time group on purpose. It is not Add Business Days (Add weekdays only; shows result weekday.) and not Weekday Name (Weekday name, ISO 1–7, and Sunday-based 0–6.). Choose this page when you need Weekend flag plus weekday number and name. If you stretch Is Weekend into a neighbor’s job, the result will look wrong even though the site chrome looks the same.

How to use Is Weekend

Confirm you need Is Weekend, not Add Business Days (Add weekdays only; shows result weekday.). Address: /datetime/is-weekend.
Enter the numbers or dates Is Weekend uses. Weekend flag plus weekday number and name.
Read the result as Is Weekend defines it — not as Weekday Name (Weekday name, ISO 1–7, and Sunday-based 0–6.). Flags Saturday/Sunday, prints Sunday-based 0–6, and a short English weekday name. Unlike Weekday Name this is primarily a weekend check. Invalid dates fail.
Is Weekend is an estimate in the browser, not professional advice. Local calendar. Weekend = Sat or Sun.
Need a different formula? Try Weekday Name (Weekday name, ISO 1–7, and Sunday-based 0–6.) instead of stretching Is Weekend.

When not to use Is Weekend

Skip Is Weekend when a neighbor tool matches better — start with Add Business Days or Weekday Name — or when the description already warns the job will fail. In the tool’s own words: Flags Saturday/Sunday, prints Sunday-based 0–6, and a short English weekday name. Unlike Weekday Name this is primarily a weekend check. Invalid dates fail.

Questions about Is Weekend

What does Is Weekend do that other Date & time pages on this site do not?: Flags Saturday/Sunday, prints Sunday-based 0–6, and a short English weekday name. Unlike Weekday Name this is primarily a weekend check. Invalid dates fail. Short version: Weekend flag plus weekday number and name.
Does Is Weekend upload my file or text to Tool-You servers?: No. Is Weekend runs in this browser tab. Files stay on the device. Limit note: Local calendar. Weekend = Sat or Sun.
Should I use Add Business Days instead of Is Weekend?: Use Is Weekend when you need Weekend flag plus weekday number and name. Use Add Business Days when you need Add weekdays only; shows result weekday. They share a category (Date & time) but not the same job.
What are the limits of Is Weekend?: Local calendar. Weekend = Sat or Sun. Also: Flags Saturday/Sunday, prints Sunday-based 0–6, and a short English weekday name. Unlike Weekday Name this is primarily a weekend check. Invalid dates fail.