Skip to main content

Reports
HTML Guide
Accessibility Guide

Check your sites

Site-wide validation for busy developers.

HTML checks.
A11Y checks.
Schedules.
Muting.
Device emulation.
Fully automated.

Sign up now

HTML Guide for datetime

Bad value X for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.

datetime
time
time-datetime format

The value used in the datetime attribute is not in a valid format.

The <time> HTML element represents a specific period in time. It may include the datetime attribute to translate dates into machine-readable format, allowing for better search engine results or custom features such as reminders.