Why Rome's day runs from nine hours to fifteen
Rome sits at 41.9° north and 12.5° east, about two-thirds of the way from the equator to the Arctic Circle. That latitude gives the city a wide annual swing: 9 hours 08 minutes on 21 December against 15 hours 14 minutes on 21 June, a range of 367 minutes — just over six hours of daylight gained and lost every year.
Both ends of that range are set by the tilt of Earth's axis, not by distance from the Sun. In late June the northern hemisphere leans 23.44° toward the Sun, so Rome's latitude sits well inside the sunlit cap and the day runs long. In late December the same tilt points away, the sunlit cap shrinks, and the city spends three-quarters of the day in shadow. The clock time of sunrise moves slowly near the solstices and quickly near the equinoxes, which is why a January morning gains only a minute a day while a March morning gains nearly two.
The month-by-month table
Sunrise and sunset for the first of each month in 2026. The two middle time columns are Central European Time (UTC+1) — exactly what the calculator above prints, because the engine holds the standard offset fixed all year. The final column repeats the pair on a Roman clock, where daylight saving adds an hour from late March to late October.
| Date (2026) | Sunrise CET | Sunset CET | Daylight | Rome clock |
|---|---|---|---|---|
| 1 January 2026 | 07:38 | 16:49 | 9h 11m | 07:38 / 16:49 (no DST) |
| 1 February 2026 | 07:23 | 17:24 | 10h 01m | 07:23 / 17:24 (no DST) |
| 1 March 2026 | 06:46 | 18:00 | 11h 14m | 06:46 / 18:00 (no DST) |
| 1 April 2026 | 05:54 | 18:35 | 12h 41m | 06:54 / 19:35 (+1 h) |
| 1 May 2026 | 05:07 | 19:07 | 14h 00m | 06:07 / 20:07 (+1 h) |
| 1 June 2026 | 04:37 | 19:38 | 15h 01m | 05:37 / 20:38 (+1 h) |
| 1 July 2026 | 04:38 | 19:49 | 15h 11m | 05:38 / 20:49 (+1 h) |
| 1 August 2026 | 05:03 | 19:30 | 14h 27m | 06:03 / 20:30 (+1 h) |
| 1 September 2026 | 05:35 | 18:45 | 13h 10m | 06:35 / 19:45 (+1 h) |
| 1 October 2026 | 06:06 | 17:53 | 11h 47m | 07:06 / 18:53 (+1 h) |
| 1 November 2026 | 06:42 | 17:05 | 10h 23m | 06:42 / 17:05 (no DST) |
| 1 December 2026 | 07:18 | 16:41 | 9h 23m | 07:18 / 16:41 (no DST) |
Read the table against the seasons. Daylight peaks at 15h 14m at the June solstice and bottoms out at 9h 08m at the December solstice — six hours apart, from one half of the year to the other. Because the table samples the first of each month it never quite touches either extreme. Note too that the longest day is neither the latest sunrise nor the earliest sunset: the earliest sunset of the year falls on 9 December, well before the solstice, and the latest sunrise not until 3 January.
Rome sits west of its time meridian
Central European Time is defined at UTC+1, which corresponds to the 15° east meridian. Rome's actual longitude is 12.5° east, so the city lies 2.5° west of its own meridian — about ten minutes of solar time. Judged on longitude alone, solar noon would fall near 12:10, noticeably after the clock's 12:00.
Across a full year, solar noon actually runs from 11:54 to 12:24 standard time. The ten-minute longitude offset never moves; the rest of the swing comes from the equation of time — the gap between apparent and mean solar time created by Earth's elliptical orbit and its axial tilt. On 1 November the Sun runs fast and noon arrives at 11:54; on 13 February it runs slow and noon is pushed to 12:24. Rome's noon therefore sits later than the noon of a city on the same latitude but on the 15° meridian, by a steady ten minutes.
Standard time or daylight time? The one adjustment to make
Italy keeps daylight saving from the last Sunday in March to the last Sunday in October, in line with the European Union's common rule. In 2026 clocks go forward on 29 March (2:00 am becomes 3:00 am, UTC+2) and back on 25 October (3:00 am becomes 2:00 am, UTC+1). The calculator does not follow that change: it prints standard time for every date you enter.
So for anything between 29 March and 25 October 2026, add one hour to both numbers to match a Roman clock. Outside that window, take them as printed.
| Date | Sunrise CET | Sunset CET | Daylight | Offset |
|---|---|---|---|---|
| 15 Jan | 07:35 | 17:03 | 9h 28m | standard |
| 20 Mar | 06:14 | 18:22 | 12h 08m | standard |
| 1 May | 05:07 | 19:07 | 14h 00m | DST +1 h |
| 21 Jun | 04:34 | 19:48 | 15h 14m | DST +1 h |
| 1 Aug | 05:03 | 19:30 | 14h 27m | DST +1 h |
| 22 Sep | 05:56 | 18:09 | 12h 13m | DST +1 h |
| 1 Nov | 06:42 | 17:05 | 10h 23m | standard |
| 21 Dec | 07:34 | 16:42 | 9h 08m | standard |
The changeover days are where readers get caught. On 28 March sunrise reads 06:01 standard time, which is also 06:01 on the wall clock. The next morning it reads 05:59 standard, but the clock has jumped to 06:59 — 58 minutes later than the day before, even though the Sun itself is two minutes earlier. October reverses it: 24 October reads 06:32 standard and 07:32 local, and on 25 October the same sunrise is 06:33 standard, which is 06:33 local — 59 minutes earlier on the wall.
The formula behind every Roman sunrise
The calculator follows the NOAA solar-position algorithm, the same one behind most published sunrise tables. For a given date it computes:
- Fractional year γ = 2π/365 × (day-of-year − 1 + 0.5)
- Equation of time, in minutes, from a four-term cosine expansion of γ
- Solar declination δ, from a seven-term expansion of the same angle
- Hour angle H = arccos[ cos z ÷ (cos φ · cos δ) − tan φ · tan δ ]
- Sunrise and sunset = solar noon ∓ 4H minutes, with noon = 720 − 4λ − EoT + 60·tz
Here φ is the latitude, λ the longitude in degrees east, and tz the standard offset in hours. The zenith angle z is 90.833°, not 90°. That extra 0.833° is atmospheric refraction at the horizon plus the angular radius of the solar disc: sunrise is defined as the moment the upper limb appears, not when the centre of the Sun crosses the horizon. Drop it and every time on this page moves by about four minutes.
Three worked examples
All three use the calculator's own standard-time output, so you can enter the same dates above and compare line by line.
21 June 2026 — the June solstice. Sunrise 04:34, sunset 19:48, solar noon 12:11. Daylight runs 15 hours 14 minutes, the longest of the year. Daylight saving is in force, so add an hour: 05:34 and 20:48 on a Roman clock. The morning golden hour lasts 63 minutes, from 04:14 (Sun at +6°) back to 05:17 (Sun at −4°).
21 December 2026 — the December solstice. Sunrise 07:34, sunset 16:42, solar noon 12:08. Daylight runs 9 hours 08 minutes, the shortest of the year. No daylight saving is in force, so the Roman clock agrees with the printed values. The golden hour stretches to about 65 minutes at each end, because the Sun crosses the horizon at a shallow angle in midwinter; the blue hour is 12 minutes.
20 March 2026 — the March equinox. Sunrise 06:14, sunset 18:22, solar noon 12:18. Daylight runs 12 hours 08 minutes — a few minutes over half a day, because refraction and the disc's size lift the Sun into view before the geometric half-day point. Daylight saving has not started yet on 20 March, so the Roman clock agrees. The golden hour shortens to 54 minutes, because the Sun crosses the horizon more steeply at an equinox than at a solstice.
Golden hour and blue hour over Rome's hills
The calculator defines the golden hour as the window in which the Sun stands between −4° and +6° above the horizon, and the blue hour as the deeper band from −6° to −4°. At Rome's latitude the golden hour runs about 63 minutes at each end of the day on the June solstice, about 65 minutes on the December solstice and 54 minutes at the equinoxes. The blue hour is much shorter — 14 minutes in June, 12 in December, 11 at the equinoxes.
The city's topography shapes what you actually see. Rome's historic centre sits on the east bank of the Tiber, among the seven hills, and the horizon to the east is low enough that sunrise clears it early — from the Pincio terrace, the Janiculum or the Aventine the Sun comes up over the rooftops rather than over a ridge. Sunset runs the other way: the Sun drops behind Monte Mario and the western suburbs, and the Janiculum's westward terrace has been the city's standard sunset viewpoint for centuries. In June the Sun rises north of due east, roughly behind the Parioli district; in December it rises south of due east, over the Caelian and the Appian way.
Where the numbers can surprise you
- The calculator prints standard time. Between 29 March and 25 October 2026, add one hour to match a Roman clock.
- The earliest sunset is not on the shortest day. The year's earliest sunset falls on 9 December at 16:39 local, twelve days before the solstice.
- The latest sunrise is not on the shortest day either. It falls on 3 January at 07:37 local — after the solstice, because the equation of time keeps pushing sunrise later into early January.
- Solar noon is never at 12:00. It ranges from 11:54 to 12:24 standard time, moved by longitude and by the equation of time.
- Refraction is already included. The 90.833° zenith means sunrise is the first appearance of the upper limb, not the centre of the disc.
- A clear horizon matters more than elevation. The algorithm assumes an unobstructed horizon at sea level. Standing on the Janiculum gains you about a minute; the ridge of Monte Mario, if it is in your line, can cost you twenty.
Sources and standards
Coordinates are the standard city reference point, 41.9° N and 12.5° E. The algorithm and the 90.833° zenith follow the NOAA Global Monitoring Laboratory's solar calculator. Time-zone and daylight-saving dates follow the European Union's common rule as applied in Italy, and the meridian basis (15° E for UTC+1) follows the international time standard maintained by the BIPM.
- NOAA Global Monitoring Laboratory — Solar Calculator
- BIPM — International Bureau of Weights and Measures (UTC)
- MeteoAM — Italian Air Force meteorological service
- Comune di Roma — city administration
Tables and worked examples on this page were generated from the site's own solar engine and cross-checked against the live calculator on 23 October 2026. Every time is reproducible: enter the same date above and the same numbers appear.