Date 6 Months From Today
Six months from today is Monday, Nov 30, 2026. This calculator adds exactly six calendar months to any start date — keeping the same day number, clamping the 29th to 31st to the month end when needed (the Excel EDATE rule), and counting 184 elapsed days. Ideal for six-month leases, semesters, and fixed-term contracts.
Result date
Nov 30
Weekday
Monday
Days elapsed
184
≈ Weeks
26
Quick Conversion
Formula: days ≈ months × 30.4375
The Six-Month Horizon Arc
Six months from Saturday, May 30, 2026 is Monday, Nov 30, 2026 — 184 days later.
Defaults to today; change it to project from any date.
Landing date
2026-11-30
Monday · 184 days
Short-term rental and sublet end dates.
Ends 2026-11-30
Fall or spring term length (~18 weeks).
Ends 2026-11-30
Probation and pilot agreement windows.
Ends 2026-11-30
Performance and budget half-year cadence.
Ends 2026-11-30
Quick Start-Date Presets
Jump the start date to a common anchor and read the +6-month landing.
Months → Date From Today
| Months from start | Date | Weekday |
|---|---|---|
| 1 months | 2026-06-30 | Tuesday |
| 2 months | 2026-07-30 | Thursday |
| 3 months | 2026-08-30 | Sunday |
| 4 months | 2026-09-30 | Wednesday |
| 5 months | 2026-10-30 | Friday |
| 6 months | 2026-11-30 | Monday |
| 7 months | 2026-12-30 | Wednesday |
| 8 months | 2027-01-30 | Saturday |
| 9 months | 2027-02-28 | Sunday |
| 12 months | 2027-05-30 | Sunday |
| 18 months | 2027-11-30 | Tuesday |
| 24 months | 2028-05-30 | Tuesday |
Looking backward instead? Try 6 months ago.
The Month-Addition Formula
result = clamp(startDay, lastDayOf(startMonth + 6))targetYear = startYear + floor((startMonth + 6) / 12)Worked: start Aug 31, 2026. startMonth (7, zero-indexed) + 6 = 13 → year +1, month index 1 (February 2027). February 2027 has 28 days, and 31 > 28, so the date clamps to Feb 28, 2027. This matches Excel's EDATE(DATE(2026,8,31), 6) and SQL DATEADD(month, 6, '2026-08-31').
Half-Year Span Reference
| Span | Day count | Notes |
|---|---|---|
| Jan 1 → Jul 1 | 181 days | Shortest common half-year (no leap) |
| Jul 1 → Jan 1 | 184 days | Longest half-year (crosses long months) |
| Average month | 30.44 days | 365.25 ÷ 12 |
| 6 months | ~182.6 days | ≈ 26 weeks · half of Earth's orbit |
Saved Calculations
No saved calculations yet. Tap "Save to History" to remember up to six date projections.
How to Use the Horizon Arc
- Leave the start date on today, or pick any date to project from a lease signing or term start.
- Keep the months selector on 6, or switch to 3, 9, 12, or 18 months to see other horizons on the same arc.
- Read the landing date at the right end of the sweeping-sun arc, along with its weekday.
- Watch for the red clamp note — it appears when your start day (29th–31st) does not exist in the target month and rolled to the month end.
- Tap "Save to History" to keep the projection, then compare lease, semester, and contract cards below.
The Half Year: How Calendars Count Six Months
In 2026, an HR coordinator drafting a six-month fixed-term contract, a landlord writing a half-year lease, and a student mapping out a single semester all ask the same question: what is the exact calendar date six months from today? The answer is rarely a clean number of days — six months can be anywhere from 181 to 184 days depending on which months you cross — so adding months, not days, is the correct operation. This calculator advances the start date by exactly six calendar months and shows the landing date as a sweeping 180-degree horizon arc.
Calendar arithmetic in months has one famous trap: month-end clamping. If you start on August 31 and add six months, the naive answer is February 31, which does not exist. The convention used by spreadsheets (Excel EDATE), databases (SQL DATEADD), and the ECMAScript Date object is to clamp to the last valid day of the target month — so August 31 plus six months becomes February 28 (or February 29 in a leap year). This tool follows that same EDATE convention so its output matches the systems your lease or contract will actually be processed in.
The Gregorian calendar, refined under Pope Gregory XIII in 1582, gives months unequal lengths inherited from the Roman calendar: 31, 28 or 29, 31, 30, and so on. Julius Caesar's Julian reform in 46 BCE set the 365.25-day year, and the Gregorian correction trimmed the leap-year rule so that century years not divisible by 400 are common years. Those quirks are exactly why a 'six month' span has no fixed day count and why month-based addition beats day-based addition for human-scale planning.
Six months is the natural unit of the half year, and our institutions are built around it. Western universities run two roughly-equal semesters; many leases offer six-month terms as a middle ground between month-to-month and a full year; corporate finance reports on H1 and H2; and probationary employment periods are commonly six months long. Knowing the precise end date lets you set renewal reminders, notice periods, and review dates without guessing.
The half-year also has a deep astronomical meaning: it is the time between a solstice and the opposite solstice, or between consecutive equinoxes. From the June solstice to the December solstice is almost exactly six months, and the Earth has travelled to the opposite side of the Sun. The sweeping sun on this tool's horizon arc is a nod to that journey — six months is one half of Earth's orbit, the arc from one season's peak to its mirror.
Practically, the safest workflow is to compute the date here, confirm the weekday (many contracts and leases prefer to start and end on business days), and then check whether month-end clamping moved your date. If your start date is the 29th, 30th, or 31st, the tool flags when the result was clamped to a shorter month — a common surprise for end-of-month leases. Pair this with a 180-day count if your agreement is written in days rather than months.
For longer or shorter horizons, the same engine scales: three months for a quarter, twelve months for an anniversary, eighteen months for an extended visa or warranty. The sibling tools cover those spans directly. But six months remains the single most-searched 'months from today' query because it sits at the centre of how leases, semesters, and review cycles are written — a tidy half-turn of the calendar.
Trusted by landlords, registrars, and HR teams
“Every six-month lease I write needs an exact end date, and the month-end clamping flag has saved me from writing 'February 31' more than once. The horizon arc makes the half-year span feel real to tenants signing.”
“I plot every fall and spring term as a six-month block. This is the only calculator that correctly handles a start on the 31st and shows me the landing weekday, which matters for scheduling exam weeks.”
“Our probation periods are six months. I paste the join date, read off the review date and its weekday, and set the reminder. The EDATE-matching logic means it agrees with our payroll system every time.”
“I run my reporting on half-year cadence and always confused myself with 180 days. Seeing that six months is 181 to 184 days, and getting the exact date, fixed my whole planning spreadsheet.”
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