A calculator about exact time
Romania's time — From Craiova noon to Greenwich mean time
When Bucharest read noon, Iași already read 12:06 and Craiova only 11:51. Pick a city, slide the year across 1891 and watch four local noons become a single railway time.
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What time was it in Iași at Bucharest noon §
Pick a city and drag the year with the slider. Before October 1891 each place keeps its own noon; past the threshold, every marker falls on 12:00.
Drag the year across 1891 and watch the rule: the scattered markers gather on 12:00.
Before October 1891, when Bucharest reads 12:00, Iași reads 12:06 — about 6 minutes ahead of Bucharest.
| City | Longitude | At Bucharest noon, before 1891 | After 1 October 1891 |
|---|---|---|---|
| Bucharest | 26.10°E | 12:00 | 12:00 |
| Iași | 27.59°E | 12:06 | 12:00 |
| Craiova | 23.82°E | 11:51 | 12:00 |
| Sulina | 29.65°E | 12:14 | 12:00 |
The rule and the table readings are a schematic drawn from rounded longitudes, not quotations from an archive timetable.
The noons, in brief
Until 1891 each place measured noon by its own Sun: Iași noon came about 6 minutes before Bucharest, Craiova about 9 minutes after, and Sulina about 14 minutes before.
From 1 October 1891 the railways ran on a single time, Bucharest mean time. The differences above stayed geography; they stopped being official time.
Eastern European Time, Greenwich plus two hours, arrived only in 1931. The novelty of 1891 was a single Bucharest time.
Noon
How a town found its noon §
Noon was a local fact: the moment the Sun stood highest, above the local meridian. The further east a town stood, the earlier its noon arrived.
1The Sun kept time
A well-set clock read 12:00 exactly as the Sun reached its highest point. Two towns on different longitudes naturally kept different times.
2Each market its own time
The gaps were minutes, not hours — 6 minutes at Iași, 9 at Craiova — yet a railway timetable cannot keep four noons at once.
3The meridian people
Astronomers found the time by watching bodies cross the meridian through instruments laid exactly north–south. The Bucharest Observatory's meridian hall, built later, became the home of that work.
The change
What 1891 brought, and what waited §
On 1 October 1891 Romania moved to a single railway time: Bucharest mean time, about one hour and 44 minutes ahead of Greenwich. Trains, the telegraph and the stations beat together across the country from then on.
One specific reservation: in a September 2026 discussion of the time-zone record, a researcher argues, quoting the 1891 press, that station clocks were put forward 16 minutes on the night of the change — the 30°E meridian hour, not Bucharest mean time — and that railway time became official for public services only on 1 December old style, through Royal Decree no. 3111. The published record keeps Bucharest time for now, and the page follows it; nobody disputes the date of the night, 1 October. The same discussion also argues for a brief move to Central European time between May and September 1931, which the published record does not adopt.
The Greenwich of the title arrived only in 1931, with Eastern European Time. Until then the country's time stayed Bucharest time.
- The 1891 legal text is not quoted here: the regulation predates the electronic law archive, and Decree 3111 appears only as a claim from the discussion cited above.
- Pre-1891 local times are approximate reconstructions from rounded longitudes; everyday life beyond stations and the telegraph is thinly documented.
- This page is about the unification of time, not about train travel: readers after carriages and routes belong with Orient-Express, and readers after life without clocks belong with fara-ceas.
Method
Where the numbers come from §
The gap between two noons comes from the longitude gap: each degree means four minutes. The inputs used are rounded longitudes — Bucharest 26.10°E, Iași 27.59°E, Craiova 23.82°E, Sulina 29.65°E — and the sum checks itself: 26.10 divided by 15 gives 1.74 hours, which is 1:44:24, the offset the time-zone record lists for Bucharest (rounded to 1:44 in the calculator).
The threshold date, 1 October 1891, appears in two places that owe nothing to each other: the international time-zone record and Romania's clock-change tables. A third witness, the period press quoted in a September 2026 discussion of the record, says the station clocks were put forward that same night.
Sources
What the page rests on §
- The international time-zone database, europe file (Europe/Bucharest line: local time 1:44:24 until October 1891, Bucharest time 1:44 until July 1931, then Eastern European Time): the Timezones for Romania thread.
- Romania's clock-change tables (first change on 1 October 1891, second on 24 July 1931): timezones.de, Chiajna/Ilfov.
- Sorin Marin, a history of the Bucharest Observatory (Romanian Astronomical Journal 27/2, pp. 107–116) — method background on the meridian hall, not on the 1891 decision: the paper's text (PDF).
- The legislative portal, legislatie.just.ro — the official root; the 1891 regulation predates the portal's coverage, so the page links to no document id.
- The Romanian Academy Library, biblacad.ro — period timetables; no excerpt is reproduced here.
- The September 2026 time-zone-record discussion carrying the 1891–1931 correction proposal (the night's date kept, the offset disputed): the 15 September 2026 message.