When does spring 2027 begin? The March equinox falls Saturday, March 20 — astronomical spring in the Northern Hemisphere.
Current target date: Saturday, March 20, 2027 (Spring equinox). Calendar anchors follow public observance — your school district or country may use a different day.
Astronomical spring 2027 begins with the March equinox on Saturday, March 20. Meteorologists already call March 1 the start of meteorological spring for climate stats — cherry blossoms and allergy counts do not wait for exact solar noon. Southern Hemisphere readers flip seasons; this page tracks northern spring.
Spring equinox
Saturday, March 20, 2027
March 20 is when the Sun crosses north — not when the weather suddenly turns mild
The March equinox is the instant the Sun crosses the celestial equator heading north. For 2027 that civil date is Saturday, March 20 in US time zones on this page. Frost, heat waves, and late snow still happen after that moment; the label is astronomy.
Allergy season often starts before the equinox does
Tree pollen in many US regions ramps up in early March — closer to meteorological spring (March 1) than to March 20. If you searched “first day of spring” because your sinuses already voted, the equinox is late to that party.
Two “springs” on the same fridge calendar
Say “spring starts March 1” and you are speaking meteorologist. Say “spring starts at the equinox” and you are speaking astronomer. Both are standard; arguing which is “real” usually means the two definitions got mixed in one sentence.
Nowruz is timed to this same solar crossing — a New Year built on the equinox
Unlike US civil “first day of spring” marketing, Nowruz treats the March equinox as the turn of the year for Iranian and related cultural calendars. The exact celebration moment can land on March 20 or 21 by time zone, but the anchor is the same astronomical event this countdown tracks — which is why the dates sit next to each other so often.
Frequently asked questions
Quick answers about this release date.
1When is the first day of spring 2027?
Astronomical spring in the Northern Hemisphere begins at the March equinox — Saturday, March 20, 2027 on this page’s civil date. Meteorological spring is often counted from March 1 for climate records.
2Why do some calendars say March 1 instead of the equinox?
Weather services split the year into three-month blocks (spring = March–April–May) so statistics stay tidy. That is a bookkeeping season, not the Sun-crossing-the-equator moment.
3Is spring the same date in the Southern Hemisphere?
No. The March equinox begins southern autumn. Southern astronomical spring arrives at the September equinox. This countdown is Northern spring only.
4Does Nowruz fall on the same day as the spring equinox?
Persian New Year (Nowruz) is timed to the March equinox and often lands on or next to March 20/21 depending on the exact instant and time zone. Related culturally, calculated on the same solar event — not identical to every nation’s civil “first day of spring” label.
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