The Day-Date complication puts two pieces of information on the dial: the date numeral and the day of the week, most often written out in full rather than abbreviated. Rolex created the genre in 1956 with references 6510 and 6511, the first wristwatches to spell out the weekday rather than shorten it, housed in a 36mm Oyster case on the President bracelet. What separates it from a plain date watch is the second disc under the dial, usually showing through a curved window at twelve o'clock, that carries the days and clicks over around midnight.
The Rolex Day-Date sits at the top of the category. The current collection comes only in 36mm and 40mm, only in 18k gold (yellow, white, Everose) or 950 platinum, and never in production steel. It runs calibre 3255, and the day disc is offered in a choice of 26 languages. As of 2026, the 36mm in yellow gold retails around £39,000 and the 40mm around £43,000, with platinum versions climbing well past £62,000. At the other end of the market, Seiko 5 models with the 4R36 movement run around £220, and the automatic Hamilton Khaki Field King stacks a curved day window above the date for roughly £600.
When buying, look first at the layout. Rolex's single curved aperture at twelve is the cleanest solution, but many brands use two small side-by-side windows that can throw off dial symmetry. Quickset matters too: Rolex introduced double quickset with calibre 3155 in 1988, letting you set day and date independently from the crown, whereas cheaper movements may force you to wind the hands around the clock repeatedly. If you want a classic gold Day-Date, vintage references 1803 and 18238 are strong value buys; for daily wear, a Seiko 5 or the Hamilton does the job handsomely.
Do not confuse a Day-Date with a big date or panorama date. The Glashutte Original Panorama Date, launched in 1997, is an enlarged twin-disc date display and shows no weekday at all. A true day-date must present the day separately; the language option, case size, and whether the disc snaps over cleanly at midnight are the details that actually reward careful shopping.
