“How long ago” is a way of asking or describing how much time has passed between a moment in the past and now (for example, “How long ago did that happen?”).

In normal use, it implies:

  • You are talking about a past event.
  • You want a quantity of time as the answer (minutes, hours, days, months, years).
  • It can be casual and short-term (“How long ago did you eat?” → “20 minutes ago”) or long-term (“How long ago did you move here?” → “Ten years ago”).

Many sites and apps use the same idea in their time labels, turning timestamps into phrases like “2 hours ago”, “3 weeks ago”, or “a long time ago” to show recency instead of an exact date.

Example:
“How long ago did you start this job?” → “I started three years ago,” meaning three years have passed between the start date and today.

So if you tell me the event and today’s date (2026-02-13), I can phrase it as “X days/months/years ago” for you.