Countdown to Summer Solstice

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The summer solstice occurs around June 21 each year in the Northern Hemisphere.

Approximate — the exact astronomical moment varies by year and timezone.

The summer solstice around June 21 is the longest day of the year in the Northern Hemisphere — the official start of astronomical summer.

The summer solstice occurs around June 21 each year in the Northern Hemisphere.

Keep this countdown on your iPhone

The Rouse app includes a one-tap Summer Solstice template — dated correctly, recurring every year, and rolling forward automatically the moment it passes. Add up to 5 alerts ("1 week before", "1 day before"), pin it to your Lock Screen widget, and tap the display to switch between days, weeks, or full units. 2 countdowns are free.

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Requires iOS 26 or later · See all 31 holiday templates

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