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The Rolex Day-Date is distinguished by its calendar: it displays the date at 3 o’clock and spells out the weekday in a window at 12 o’clock. Rolex introduced it in 1956, and says it was the first calendar wristwatch to show the day of the week in full alongside the date. The collection remains defined by precious-metal cases and the President bracelet, but details such as size, dial, bezel and water resistance depend on the specific reference.
What makes the Rolex Day-Date different?
Its full weekday display is the defining feature. Rolex says the Day-Date debuted in 1956 with the day spelled out in full at 12 o’clock and the date shown at 3 o’clock—a calendar arrangement the company describes as a first for a wristwatch. The weekday display is available in 26 languages, according to Rolex’s Day-Date overview.
Rolex calls the Day-Date “the most prestigious and most exclusive watch in the Oyster Perpetual collection.” That is the brand’s characterization, rather than an independent ranking. The combination of the full weekday display, precious-metal construction and distinctive bracelet gives the model its recognizable identity.
What sizes and materials are available?
Rolex’s newsroom describes two Day-Date sizes: 36 mm and 40 mm. It says the collection is made only in precious metals, naming 18 ct yellow, white and Everose gold, as well as 950 platinum. Those are family-level facts; they do not mean every metal, dial and bezel combination is offered in both sizes. Check the current listing for the individual configuration.
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For a specific example, Rolex’s brochure for the Day-Date 40 reference 228235 describes a 40 mm Oyster case in 18 kt Everose gold, a fluted bezel and a sundust dial. Those are details of that reference, not specifications to assume for every Day-Date.
What is the President bracelet?
Rolex created the President bracelet for the Day-Date’s 1956 launch. The brand describes it as a three-piece link bracelet with semi-circular links, made in precious metal. Its concealed Crownclasp keeps the clasp visually discreet, while ceramic inserts around the link pins are intended to support the bracelet’s durability.
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What movement is in the Day-Date?
Rolex says the Day-Date 36 and Day-Date 40 use self-winding calibre 3255. The company gives the movement an approximate 70-hour power reserve and describes its finished-watch precision criterion as −2/+2 seconds per day. Rolex says its Superlative Chronometer certification involves testing the fully assembled watch after casing; these are manufacturer claims, not independent comparative test results.
What does a specific Day-Date 40 reference offer?
The Rolex brochure for reference 228235 lists the following specifications. They apply to that documented configuration, not automatically to other Day-Date references.
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| Specification | Day-Date 40 reference 228235 |
|---|---|
| Case | 40 mm Oyster case in 18 kt Everose gold |
| Bezel and dial | Fluted bezel; sundust dial |
| Movement | Calibre 3255 |
| Precision | −2/+2 seconds per day after casing, as specified by Rolex |
| Power reserve | Approximately 70 hours |
| Calendar | Instantaneous day and date |
| Bracelet and clasp | President bracelet with concealed folding Crownclasp |
| Water resistance | 100 metres / 330 feet |
| Certification | Superlative Chronometer |
Rolex notes in the brochure that it may modify featured models. The listed specifications therefore identify the brochure’s example, not a guarantee of current stock or availability.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How should you compare Day-Date configurations?
Start with the case size and metal, then compare the dial and bezel. Confirm the reference-specific details—such as water resistance, bracelet or clasp description—against the current Rolex listing or documentation for the watch in question. Rolex’s broad collection information establishes sizes and material families, but not that every possible combination exists.
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The official sources establish Rolex’s descriptions and specifications; they do not establish current prices, stock, market value, resale performance or investment returns. These should be checked separately rather than inferred from the watch’s prestige positioning.
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