Does Weekday Name upload my file or text to Tool-You servers?

No. Weekday Name runs in this browser tab. Files stay on the device. Limit note: Local YMD to weekday name.

Should I use Weekday Name instead of Weekday Name?

Use Weekday Name when you need English weekday name for a date. Use Weekday Name when you need Weekday name, ISO 1–7, and Sunday-based 0–6. They share a category (Date & time) but not the same job.

Weekday Name

English weekday name for a date.

Returns the English weekday name and ISO number for a local date. Unlike Weekday this prints a name. Unlike Is Weekend this is not a yes/no. Invalid dates fail.

What Weekday Name does

Returns the English weekday name and ISO number for a local date. Unlike Weekday this prints a name. Unlike Is Weekend this is not a yes/no. Invalid dates fail.

Practical limit for Weekday Name: Local YMD to weekday name. That is why output can differ from heavy desktop Date & time software. Read the tool-specific note again: Returns the English weekday name and ISO number for a local date. Unlike Weekday this prints a name. Unlike Is Weekend this is not a yes/no. Invalid dates fail.

How to use Weekday Name

Confirm you need Weekday Name, not Weekday Name (Weekday name, ISO 1–7, and Sunday-based 0–6.). Address: /datetime/weekday-name.
Enter the numbers or dates Weekday Name uses. English weekday name for a date.
Read the result as Weekday Name defines it — not as Is Weekend (Weekend flag plus weekday number and name.). Returns the English weekday name and ISO number for a local date. Unlike Weekday this prints a name. Unlike Is Weekend this is not a yes/no. Invalid dates fail.
Weekday Name is an estimate in the browser, not professional advice. Local YMD to weekday name.
Need a different formula? Try Is Weekend (Weekend flag plus weekday number and name.) instead of stretching Weekday Name.

When not to use Weekday Name

Skip Weekday Name when a neighbor tool matches better — start with Weekday Name or Is Weekend — or when the description already warns the job will fail. In the tool’s own words: Returns the English weekday name and ISO number for a local date. Unlike Weekday this prints a name. Unlike Is Weekend this is not a yes/no. Invalid dates fail.

Questions about Weekday Name

What does Weekday Name do that other Date & time pages on this site do not?: Returns the English weekday name and ISO number for a local date. Unlike Weekday this prints a name. Unlike Is Weekend this is not a yes/no. Invalid dates fail. Short version: English weekday name for a date.
Does Weekday Name upload my file or text to Tool-You servers?: No. Weekday Name runs in this browser tab. Files stay on the device. Limit note: Local YMD to weekday name.
Should I use Weekday Name instead of Weekday Name?: Use Weekday Name when you need English weekday name for a date. Use Weekday Name when you need Weekday name, ISO 1–7, and Sunday-based 0–6. They share a category (Date & time) but not the same job.
What are the limits of Weekday Name?: Local YMD to weekday name. Also: Returns the English weekday name and ISO number for a local date. Unlike Weekday this prints a name. Unlike Is Weekend this is not a yes/no. Invalid dates fail.