Holidays in Georgia

Official national public holidays. Regional and religious observances may vary by area.

About Time in Georgia

The Clock Once Matched Tbilisi's Longitude to Within 49 Seconds

For centuries, there was no need for Tbilisi to fit neatly into a whole-hour international time zone. Local mean time followed the city's longitude, and historical time-zone records reconstruct its offset as UTC+2:59:11. That value is remarkably close to three hours because Tbilisi lies near 45 degrees east longitude, the meridian that corresponds geometrically to UTC+3.

The change to an exact whole-hour standard came on 2 May 1924. The clock advanced by only 49 seconds, from Tbilisi Mean Time at UTC+2:59:11 to UTC+3. The adjustment was almost imperceptible in daily life, yet technically important. Civil time had ceased to be a direct expression of one city's astronomical longitude and had become part of a standardized zone system that could be shared across transport, communications and administration.

Modern time is considerably farther from the local solar reference. The country now uses UTC+4 throughout the year. In Tbilisi, that places the civil clock roughly one hour ahead of local mean solar time. Apparent solar noon varies through the year because of the equation of time, but it normally occurs much closer to 1 p.m. than to 12 p.m. The difference is not an error. It is the consequence of using a national time standard whose reference meridian lies well east of the capital.

The Unusual Clock Sequence of 2004 and 2005

The present UTC+4 arrangement emerged from one of the more complicated recent time reforms in the region. In 1998, presidential decree introduced what Georgian legislation called "decree time", advancing clocks by an additional hour. The official document cited requests from residents as well as difficult conditions in the electricity system. Seasonal summer-time rules were also operating, creating a system in which the relationship between standard time, summer time and the additional hour was not always intuitive.

President Decree No. 177 of 24 May 2004 attempted to simplify that structure. It abolished decree time and ordered the introduction of zonal, or geographical, time. At 03:00 on 27 June, clocks were moved back by one hour. Because the country was already in its summer-time period, the immediate UTC offset changed from UTC+5 to UTC+4. When summer time ended on 31 October, the clock moved back once more, leaving Tbilisi at UTC+3.

The UTC+3 period lasted only a few months. A decree issued in February 2005 ordered another one-hour advance on 27 March. The clock returned to UTC+4. Ordinarily that would have been treated as the beginning of a temporary summer-time season, but in October the government ordered the existing time calculation to remain in force and repealed the earlier framework governing seasonal transitions. IANA subsequently recorded the result as permanent UTC+4 with no further daylight-saving changes in Tbilisi.

The sequence is important for historical data because 2004 contains three different UTC offsets in the capital: UTC+4 before the spring transition, UTC+5 after the March advance, UTC+4 again after the June reform, and finally UTC+3 after the October change. In March 2005 the clock returned to UTC+4 and stayed there. A database that applies today's fixed UTC+4 offset to timestamps from that period can therefore be wrong by one or even two hours.

A Medieval Observatory Above Tbilisi

The history of observing time and the sky reaches much farther back than modern time zones. Georgian historical scholarship associates the Shahistakhti section of the Narikala ridge with a medieval astronomical observatory. The evidence has to be described carefully: the exact age and development of the site are not completely established archaeologically. Georgian Encyclopedia cites the tenth-century geographer al-Istakhri as evidence for an observatory in Tbilisi by the late eighth century, while modern research describes the location as a longstanding scholarly tradition supported by later historical and archaeological evidence.

The strongest physical connection with time measurement is a carved stone dial discovered during archaeological work around Narikala. It has hour divisions, ornament based on zodiac constellations and a fitting for a gnomon, the projecting element required for a sundial. Rather than being simply an astronomical motif carved into stone, the surviving features are consistent with an instrument intended to use the Sun's shadow to indicate time.

The site is also connected in Georgian scholarship with the thirteenth-century astronomer and physician Fakhr al-Din al-Akhlati, who later became associated with the celebrated Maragheh Observatory. The documentary history is not complete enough to reconstruct the medieval Tbilisi institution in the detail possible for later observatories, but the combination of written references and the sundial discovery makes it an important part of the region's scientific chronology.

An Observatory That Opened at "Zero O'Clock" When Zero Meant Noon

A particularly revealing timekeeping detail survives in the history of the nineteenth-century Tbilisi physical and astronomical observatory. Its purpose-built complex at Kukia was designed in 1859, constructed in 1860 and 1861, and recorded as beginning work in the new building at "0 o'clock astronomical time" on 1 May 1862.

That wording does not mean midnight in the modern sense. Until 1925, astronomers commonly reckoned the astronomical day from noon. Zero hours astronomical time therefore corresponded to noon by ordinary civil reckoning. The convention was convenient for night observations because an entire observing night could remain under one astronomical date instead of changing date at midnight. International astronomical practice moved to a midnight-based day in 1925, eliminating a distinction that can otherwise produce twelve-hour errors when old observation records are interpreted using modern conventions.

The Tbilisi institution belonged to a period when accurate time was essential to several sciences at once. Astronomy required precise clock readings for positional observations, longitude depended on comparing local astronomical time between locations, and magnetic observatories needed observations made at known times so measurements from distant stations could be compared. Nineteenth-century reference works listed the observatory's longitude in hours, minutes and seconds of time east of Greenwich, illustrating how closely geography and time measurement were still connected.

Abastumani Moved Precision Astronomy Into the Mountains

Modern astrophysical research gained a permanent high-altitude base with the foundation of the Abastumani Astrophysical Observatory in 1932 under astronomer Evgeni Kharadze. Both the observatory itself and the Georgian Encyclopedia identify it as the first high-altitude astrophysical observatory in the former Soviet Union. In 1937, its main observing facilities were moved to Mount Kanobili, roughly 1,650 to 1,700 metres above sea level, where atmospheric transparency and stability were better suited to astronomical work.

The location mattered because many astronomical measurements depend not only on collecting light but on recording how objects change over time. The observatory developed programs involving variable and unstable stars, solar activity, galaxies, Solar System objects and the upper atmosphere. Its archives include long observational series, among them measurements of nightglow emissions extending across decades. Such records become more valuable with time because they allow researchers to compare phenomena observed under the same long-running scientific program across different epochs.

The contrast with the medieval sundial at Narikala is substantial but the underlying problem is related. A sundial extracts time from the apparent daily motion of the Sun. An astrophysical observatory instead needs accurately known time in order to measure motions, periodicity and change in distant objects. The direction of dependence has largely reversed: astronomy once helped societies determine the time, while modern astronomy depends on increasingly precise external time standards to interpret what telescopes record.

Why the New Year Can Arrive Twice

Civil and religious calendars continue to overlap in everyday life. The Labour Code lists 1 and 2 January as New Year holidays and 7 January as Christmas Day. The latter date reflects the continuing importance of the Julian calendar in Georgian Orthodox religious practice. During the twentieth and twenty-first centuries, the Julian calendar runs 13 days behind the Gregorian calendar, so 25 December in the Julian system corresponds to 7 January in the Gregorian calendar.

The same 13-day difference produces the Old New Year celebrated on 14 January. In the Julian calendar, that Gregorian date corresponds to 1 January. The celebration is not simply a mathematical curiosity. Official tourism material describes Old New Year as an established living tradition, known in some regions by names such as Kalanda or Kalandoba and accompanied by local customs including the chichilaki, the traditional carved hazelnut-wood New Year tree.

The calendar gap is not permanently fixed at 13 days. The Julian system treats every year divisible by four as a leap year, while the Gregorian system omits the leap day in most century years unless the year is divisible by 400. Because 2100 will be a leap year in the Julian calendar but not in the Gregorian one, the difference will eventually increase to 14 days. The relationship between familiar January celebrations is therefore the visible result of two different mathematical rules for keeping the calendar aligned with the solar year.

Frequently Asked Questions