When Is the Next Leap Year? 2028 Date, Rules & Leaplings

You probably know that every four years we get an extra day — February 29 — but the rules are trickier than just “divisible by 4.” The next leap year is 2028, and if you’re a leap year baby born on February 29, 2024, you’ll turn 2 years old in 2026.

Next leap year: 2028 · Next leap day: February 29, 2028 · Last leap year: 2024 · Leap years from 2000 to 2026: 7 · Leap year frequency: every 4 years with exceptions · Years skipped in 400-year cycle: 3 century years (e.g., 2100, 2200, 2300)

Here is a quick reference of the most important leap year data.

When is the next leap year?

The next leap year is 2028. March 1, 2028 will come after February 29, 2028 — a leap day that falls on a Tuesday, according to USA Today, national news outlet. The last leap year was 2024, making the 2028 leap year the first in a new four-year cycle.

Next leap year 2028

• 2028 is divisible by 4 and is not a century year, so it qualifies under Gregorian rules (U.S. Naval Observatory, official timekeeping authority).
• 2028 will have 366 days, with February containing 29 days instead of 28 (timeanddate.com, calendar reference site).

Next leap day February 29, 2028

• February 29, 2028 will be a Tuesday (USA Today, national news outlet).
• After 2028, the next leap day will be February 29, 2032 (timeanddate.com, calendar reference site).

The pattern: every 4 years a leap day lands on the same day of the week as in 2028 (Tuesday), but the calendar then jumps ahead by one weekday. As Wikipedia, community encyclopedia notes, the date “leaps” over one day of the week compared to the previous year.

The implication: aligning your schedule around this rare date ensures you don’t miss the extra day that keeps our calendar in sync.

Is leap year every 4 years always?

Not quite. The Gregorian calendar rule, stated by the U.S. Naval Observatory, official timekeeping authority, is: a year is a leap year if it is evenly divisible by 4, except centurial years not evenly divisible by 400. So 2028 qualifies (divisible by 4, not a century year), but 2100 does not — even though it’s divisible by 4.

Leap year rules: every 4 years with exceptions

• Years divisible by 100 but not by 400 are not leap years (National Research Council Canada, government authority).
• 2100, 2200, and 2300 will all be skipped (U.S. Naval Observatory, official timekeeping authority).
• The next skipped century year is 2100 (BBC Future, science and culture magazine).

The 400-year rule explained

• Years divisible by 400 are always leap years — including 2000 and 2400 (National Research Council Canada, government authority).
• 1600 and 2000 were leap years because they pass the 400 test (U.S. Naval Observatory, official timekeeping authority).

The implication: without the century rule, the calendar would drift about 3 days every 400 years. The 97-leap-year cycle keeps the calendar aligned to the seasons.

“Under the Gregorian calendar, a year is a leap year if it is evenly divisible by 4, except centurial years not evenly divisible by 400.”

U.S. Naval Observatory, official timekeeping authority

What happens every 400 years?

Every 400 years, the Gregorian calendar repeats its leap year pattern exactly —’the same dates fall on the same days of the week. The Royal Observatory of Belgium, astronomical authority confirms that the Gregorian calendar has 97 leap years per 400-year cycle.

The Gregorian 400-year cycle

• There are 97 leap years and 303 common years in 400 years (Royal Observatory of Belgium, astronomical authority).
• The entire leap year pattern repeats every 400 years (timeanddate.com, calendar reference site).

Leap year pattern repeats every 400 years

• For example, the leap year sequence from 2000 to 2399 will be identical to the sequence from 2400 to 2799 (U.S. Naval Observatory, official timekeeping authority).

The catch: this elegance comes from the fact that the Earth’s orbit is not exactly 365.25 days. The 400-year rule corrects the 11-minute-per-year discrepancy that the Julian calendar ignored.

How old would a leap year baby be in 2026?

If you were born on February 29, 2024 (the last leap year), you’ll turn 2 in 2026 — but you’ll celebrate on either March 1 or February 28, depending on local convention. The BBC Future, science and culture magazine explains that leaplings typically celebrate on February 28 or March 1 in non-leap years.

Calculating leap year baby age

• A leapling born in 2020 would turn 6 in 2026 (LazyTools, leap year calculator).
• General formula: subtract birth year from current year (timeanddate.com, calendar reference site).

Leaplings celebrate March 1 or February 28 in non-leap years

• In many countries, the legal birthday is considered March 1 (National Research Council Canada, government authority).
• Some celebrate on February 28 to keep the February association (BBC Future, science and culture magazine).

The trade-off: leaplings age legally like everyone else, but their actual “leap day” celebration only comes around every four years — making each one a special event.

What this means: every leap day is a rare occasion that demands a bigger celebration than usual.

Who decided we needed a leap year?

The concept dates back to Julius Caesar. In 46 BC, Caesar introduced the Julian calendar with a leap year every four years, as described by BBC Future, science and culture magazine. But that system overcorrected — the year was slightly too long.

Julius Caesar and the Julian calendar

• Caesar’s astronomer Sosigenes suggested adding one day every four years (BBC Future, science and culture magazine).
• The Julian calendar was used for over 1500 years (Wikipedia, community encyclopedia).

Pope Gregory XIII and the Gregorian calendar

• In 1582, Pope Gregory XIII refined the system with the century rule (U.S. Naval Observatory, official timekeeping authority).
• The Gregorian calendar is the civil calendar used worldwide today (Royal Observatory of Belgium, astronomical authority).

Why this matters: without the leap year, our calendar would drift about 24 days every century — summer would start in November.

The pattern: each reform brought the calendar closer to astronomical reality, and the Gregorian system remains the global standard.

Timeline: Leap year history and future

• 46 BC — Julius Caesar introduces the Julian calendar with leap years every 4 years (BBC Future, science and culture magazine).
• 1582 — Pope Gregory XIII reforms the calendar; Gregorian calendar introduced with refined leap year rules (U.S. Naval Observatory, official timekeeping authority).
• 1752 — British Empire adopts Gregorian calendar (skips 11 days) (Wikipedia, community encyclopedia).
• 2024 — Last leap year (timeanddate.com, calendar reference site).
• 2028 — Next leap year; leap day February 29 (USA Today, national news outlet).
• 2100 — First skipped century year under Gregorian rules (not a leap year) (U.S. Naval Observatory, official timekeeping authority).

The pattern: each entry in this timeline marks an adjustment that keeps our calendar accurate to the seasons.

Clarity: What’s confirmed and what’s unclear

Confirmed facts

• Next leap year is 2028 (timeanddate.com, calendar reference site).
• Leap day is February 29, 2028 (USA Today, national news outlet).
• 2000 to 2026 includes 7 leap years (National Research Council Canada, government authority).
• Leap year rules: every 4 years, but century years not divisible by 400 are skipped (U.S. Naval Observatory, official timekeeping authority).

What’s unclear

• Exact legal interpretation of February 29 birthday varies by jurisdiction (most treat March 1 as the official birthday) (National Research Council Canada, government authority).
• Some cultures may use different calendar systems that affect leap year calculations (Wikipedia, community encyclopedia).
• Historical records on the first leap year in 46 BC are debated among historians (BBC Future, science and culture magazine).
• Some countries define the legal birthday for leaplings differently, creating potential confusion for contracts and IDs (National Research Council Canada, government authority).

“The last leap year was 2024. So 2028 will be our next leap year, a 366-day-long year.”

EarthSky, astronomy publication

“The next leap year will be in 2028. Leap Day that year will be observed on Tuesday, Feb. 29.”

CBS News, national broadcaster

If you’re born on February 29, your legal rights are generally the same as anyone else’s — but the day you turn 18, 21, or 65 may be legally defined as March 1 in some countries. That’s a nuance worth checking with local authorities.

For anyone curious about the calendar, the next leap year (2028) is a concrete anchor. For leaplings, it’s the only real birthday in four years. The 400-year rule means our descendants in 2100 will experience a rare skipped leap year — a reminder that our calendar is a human invention, not a law of nature.

Frequently asked questions

The pattern: these common questions cover the essential facts that most people seek about leap years.

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