What does Days Since Epoch do that other Date & time pages on this site do not?

Local days since Unix epoch date; also approximate years and weekday. Short version: Days since 1970-01-01 with years and weekday.

Does Days Since Epoch upload my file or text to Tool-You servers?

No. Days Since Epoch runs in this browser tab. Files stay on the device. Limit note: Local midnight epoch, not UTC.

Should I use Unix from YMD instead of Days Since Epoch?

Use Days Since Epoch when you need Days since 1970-01-01 with years and weekday. Use Unix from YMD when you need Unix from date with weekday and ms. They share a category (Date & time) but not the same job.

What are the limits of Days Since Epoch?

Local midnight epoch, not UTC. Also: Local days since Unix epoch date; also approximate years and weekday.

Days Since Epoch

Days since 1970-01-01 with years and weekday.

Local days since Unix epoch date; also approximate years and weekday.

What Days Since Epoch does

Local days since Unix epoch date; also approximate years and weekday.

Days Since Epoch sits in the Date & time group on purpose. It is not Unix from YMD (Unix from date with weekday and ms.) and not Julian Day Number (Gregorian date to JDN and Modified Julian Day.). Choose this page when you need Days since 1970-01-01 with years and weekday. If you stretch Days Since Epoch into a neighbor’s job, the result will look wrong even though the site chrome looks the same.

How to use Days Since Epoch

Confirm you need Days Since Epoch, not Unix from YMD (Unix from date with weekday and ms.). Address: /datetime/days-since-epoch.
Enter the numbers or dates Days Since Epoch uses. Days since 1970-01-01 with years and weekday.
Read the result as Days Since Epoch defines it — not as Julian Day Number (Gregorian date to JDN and Modified Julian Day.). Local days since Unix epoch date; also approximate years and weekday.
Days Since Epoch is an estimate in the browser, not professional advice. Local midnight epoch, not UTC.
Need a different formula? Try Julian Day Number (Gregorian date to JDN and Modified Julian Day.) instead of stretching Days Since Epoch.

When not to use Days Since Epoch

Skip Days Since Epoch when a neighbor tool matches better — start with Unix from YMD or Julian Day Number — or when the description already warns the job will fail. In the tool’s own words: Local days since Unix epoch date; also approximate years and weekday.

Questions about Days Since Epoch

What does Days Since Epoch do that other Date & time pages on this site do not?: Local days since Unix epoch date; also approximate years and weekday. Short version: Days since 1970-01-01 with years and weekday.
Does Days Since Epoch upload my file or text to Tool-You servers?: No. Days Since Epoch runs in this browser tab. Files stay on the device. Limit note: Local midnight epoch, not UTC.
Should I use Unix from YMD instead of Days Since Epoch?: Use Days Since Epoch when you need Days since 1970-01-01 with years and weekday. Use Unix from YMD when you need Unix from date with weekday and ms. They share a category (Date & time) but not the same job.
What are the limits of Days Since Epoch?: Local midnight epoch, not UTC. Also: Local days since Unix epoch date; also approximate years and weekday.