How Many Weeks Until First Day of Fall 2027?

First Day of Fall 2027 falls on Thursday, September 23, 2027 — a Thursday. As of today that is 335 days, or 47 weeks and 6 days. The table below lists every "weeks to go" milestone between now and the date, so you can work backwards from the day itself instead of counting forward from today.

Why the week count moves the way it does

Weeks are the unit people actually plan in. Deadlines, notice periods and rotas run in weeks, which is why a week count tends to be more useful than a raw day count once you are more than a fortnight out. Note that the two figures answer slightly different questions: "how many weeks" is full weeks only, while "weeks and days" keeps the remainder.

About First Day of Fall 2027

The september equinox of 2027 falls on September 23, 2027 at 05:56 UTC — the astronomical start of fall in the Northern Hemisphere (spring below the equator).

Astronomically, this is the Sun crosses the equator heading south — spring in the Southern Hemisphere. It is also the day the tide of daylight turns: after the September solstice the change is barely minutes per week, then accelerates — the reason the weeks after a solstice feel darker (or lighter) faster than the solstice day itself.

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