A Calendar House is a house that symbolically contains architectural elements in quantities that represent the respective numbers of days in a year, weeks in a year, months in a year and days in a week.

Examples

Examples are very rare and are more often found in European buildings of the late 16th and early 17th centuries.
There is also a calendar house called Rose Hall Great House located east of Montego Bay, Jamaica, that was owned by Annie Palmer. The large country estate Mona Vale in Tasmania, Australia, built in the 1880s, is said to have been designed as a calendar house.

Notable examples in Britain include Knole House

Knole House

Knole is an English country house in the town of Sevenoaks in west Kent, surrounded by a deer park. One of England's largest houses, it is reputed to be a calendar house, having 365 rooms, 52 staircases, 12 entrances and 7 courtyards...

 in Kent

Kent

Kent is a county in southeast England, and is one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of...

 and Cairness House

Cairness House

Cairness House, south of Fraserburgh in the County of Aberdeenshire, is the largest and finest country house in Buchan and one of the great houses of Scotland. It was built between 1791 and 1797 to designs by architect James Playfair and replaced an earlier house of 1781 by Robert Burn, which was...

 in Aberdeenshire

Aberdeenshire

Aberdeenshire is one of the 32 unitary council areas in Scotland and a lieutenancy area.The present day Aberdeenshire council area does not include the City of Aberdeen, now a separate council area, from which its name derives. Together, the modern council area and the city formed historic...

, Avon Tyrrell House in Hampshire

Hampshire

Hampshire is a county on the southern coast of England in the United Kingdom. The county town of Hampshire is Winchester, a historic cathedral city that was once the capital of England. Hampshire is notable for housing the original birthplaces of the Royal Navy, British Army, and Royal Air Force...

 and Holme Eden Hall in Cumbria.

Adare Manor

Adare Manor

Adare Manor is a 19th century manor house located on the banks of the River Maigue in the village of Adare, County Limerick, Ireland, the former seat of the Earl of Dunraven and Mount-Earl, now a luxury resort hotel - the Adare Manor Hotel & Golf Resort....

 in County Limerick

County Limerick

It is thought that humans had established themselves in the Lough Gur area of the county as early as 3000 BC, while megalithic remains found at Duntryleague date back further to 3500 BC...

, Ireland is an example of a Calendar House, with 365 stained-glass windows and 52 chimneys. It was designed by the architects James Pain

James Pain

James Pain was born into a family of English architects. His grandfather was William Pain, his father James Pain and his brother George Richard Pain. James Pain served as an apprentice to the architect John Nash of London. James and George Richard were commissioned by the Board of First Fruits...

 and Philip Hardwick

Philip Hardwick

Philip Hardwick was an eminent English architect, particularly associated with railway stations and warehouses in London and elsewhere...

. Much of the interior was designed by E.W. Pugin.

Castle Grad in the north-western Goricko region of Slovenia with its 365 rooms is a Central European example of a Calendar house.