What date was 180 days ago?
Here is the date that falls 180 days back of today, with its weekday beside it. The calculation runs in your browser, from your clock.
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Working it out from your device’s clock…
The date above is calculated on your own device when the page opens, from your device’s clock and time zone. Nothing is uploaded and no date is stored on this page.
How this date is worked out
Your browser reads today’s date from your device and subtracts 180 days, which gives the date above. The same date engine drives the date calculator, so the two pages cannot disagree with each other.
Every calendar day counts, weekends and public holidays included. Today is treated as day zero, so the result is the 180th day before today rather than counting today itself as the first day. If your contract counts the starting day as day one, shift the result by a day.
Because the answer depends on today, it is not written into the page. It is recalculated every time the page opens, in your own time zone, and never leaves the device.
The far edge of a rolling half-year
A rolling 180-day window is today plus the 179 days before it, so the date above — a full 180 days back — is the day that has just dropped out of it, and the first day still inside the window is the one after. That one-day distinction matters most under the Schengen short-stay rule, where no more than 90 days of stay are permitted in any such window: every day spent abroad ages out of the count exactly 180 days later. The date above is the marker to check your travel history against, rather than 1 January.
Six-month lookbacks in records and eligibility
Half-year lookbacks are used where recency matters but a single quarter is too noisy: six months of address history, six months of payment behaviour on a credit file summary, and the "within the last six months" wording on medical and screening forms. Note the slight mismatch — 180 days is a day or two short of six calendar months, so a form asking for six months wants a fraction more history than the date above.
What the count does not skip
Nothing is skipped here: weekends and public holidays sit inside the count, which is what a plain day count means in almost every contract, notice and policy.
The result box still shows how the span divides — how many of the days are Mondays to Fridays and how many are weekend days — because that is usually the real question behind “will this be dealt with in time”. Public holidays are not deducted from that weekday figure.
Common questions
Is 180 days ago six months ago? Close, but one to four days later. Six calendar months back is 181 to 184 days depending on the months in the span.
How does this help with the Schengen 90/180 rule? It marks the far edge of the current rolling window. The window is today plus the 179 days before it, so stays from the day after the date shown onwards still count against the 90-day allowance, and anything earlier has aged out.
Does the count include today? No. The date shown is 180 full days before today, so today and that date are 181 days apart when both are counted. An inclusive "last 180 days" window starts the day after the date shown.
Other intervals
If this was not quite the interval you needed, one of these will be.