Born on June 21: Zodiac Sign & Birthstone

Anyone born on June 21 is a Cancer. The June 21 birthstone is Pearl and the June 21 birth flower is the Rose. This is a boundary date, so in some birth years it falls under Gemini instead.

What it means to be born on June 21

A birthday on the 21st of June falls under Cancer. Cancer is a cardinal water sign ruled by the Moon, associated in tradition with home, family and deep feeling. The crab, with its protective shell, mirrors the sign's guarded but caring nature. Cancer season opens summer.

June 21 sits on the Gemini and Cancer boundary

This date is one of the twelve changeovers in the zodiac. A tropical sign begins at the moment the sun reaches a particular point, and that moment drifts by roughly six hours a year before a leap day pulls it back. On a boundary date the crossing can therefore land on either side of the calendar day, depending on the birth year and the time zone. Charts that publish fixed dates, including ours, round it.

In practice that means a birthday on June 21 is Cancer in most years and Gemini in some. Only an ephemeris for the exact birth year and time settles it. The full list of boundaries is in the cusp guide.

What weekday June 21 falls on

A common year is 365 days, which is 52 weeks plus one day, so a birthday moves forward one weekday each year and two across a leap year. Over time it visits all seven. The next time June 21 falls at a weekend is 2031, on a Saturday.

The weekday June 21 falls on over the next ten years.
Year	Weekday	Weekend?
2026	Sunday	yes
2027	Monday	no
2028	Wednesday	no
2029	Thursday	no
2030	Friday	no
2031	Saturday	yes
2032	Monday	no
2033	Tuesday	no
2034	Wednesday	no
2035	Thursday	no

Your June 21 birthstone and flower

Because June 21 sits in June, your birthstone is Pearl, a creamy white gem traditionally meaning purity, wisdom and hidden treasure. Your birth flower is the Rose, which stands for love, passion and devotion. Together they make a natural birthday pairing for a card, gift or tattoo.

Every tradition tied to June 21

Everything the calendar assigns to June 21, in one table.
Field	Value
Zodiac sign	Cancer (June 21 to July 22)
Element and modality	Cardinal Water
Ruling planet	The Moon
Lucky colors	Silver and Sea green
Modern birthstone	Pearl, creamy white
Other recognized stones	Alexandrite (color-change, green to red), Moonstone (milky white with blue sheen)
Birth flower	Rose, with Honeysuckle as secondary
Day of the year	173 of 366 and 172 of 365
On a sign boundary	yes, shared with Gemini

Cancer strengths and matches

Cancer is often described as nurturing, loyal and intuitive. In the traditional element model, Cancer matches most easily with Scorpio, Pisces and Taurus. Those percentages come from a published formula you can check on the method page, not from a reading.

See the full birth profile

Want the shareable card for June 21? Open the birth profile tool, pick this date, and download a card to save or share. You can also read the full June overview, or browse every date we cover.

Frequently asked questions

What zodiac sign is June 21?

Anyone born on June 21 is a Cancer, a cardinal water sign ruled by The Moon. June 21 sits exactly on the boundary with Gemini, so for some birth years the answer is Gemini instead.

What is the birthstone for June 21?

The birthstone for June 21 is Pearl, the June birthstone, which is creamy white. June also recognizes Alexandrite and Moonstone.

What is the birth flower for June 21?

The birth flower for June 21 is the Rose, the June birth flower, with the Honeysuckle as a secondary flower.

What day of the week does June 21 fall on?

In 2026 it falls on a Sunday. Because a common year is 365 days, the weekday moves on by one each year and by two across a leap year, so it cycles through all seven over time. The table on this page lists the next ten years.

Where does June 21 fall in the year?

June 21 is day 173 of a leap year and day 172 of a common year.

Is June 21 on the cusp?

Yes. June 21 is a boundary date between Gemini and Cancer. The sun does not cross the boundary at the same clock time each year, so a birthday here can belong to either sign depending on the birth year and time zone. Settling it needs an ephemeris, not a date table.

Born on June 21