Dates

Show how long ago or how far away a date is, like "Now", "1 minute ago", or "in 4 months". Use style "long" for "10 days ago", "short" for "10d ago". Other locales use Intl.RelativeTimeFormat.

Measure the gap between two dates. With unit set to "auto", you get a breakdown like "2 days 5 hrs". Pick a single unit like "days" to get something like "6212 days".

Include times on multi-day ranges. Same-day different times always show times.

Check if a date is in the past.

Check if a date is in the future

Check if two dates fall on the same calendar day in local time.

Check if two dates fall in the same calendar month in local time.

Check if a date falls between a start and end date by timestamp.