Seiko Mod Day-Date Style Watches

Explore Seiko Day-Date Mod styling through independent ModTime builds with Miyota automatic day-and-date movements.

Explore Seiko Day-Date Mod styling through independent ModTime builds with Miyota automatic day-and-date movements. Compare chocolate, olive, Tiffany-blue and white dials to find your configuration.

Seiko Day-Date Mod — dial color and a useful calendar

A Seiko Day-Date Mod brings the calendar-watch silhouette into a collection where color helps you choose. A chocolate dial creates a warmer center; olive offers a quieter color accent; Tiffany blue gives the face a brighter direction. A white dial against a gold-tone finish takes another approach, keeping the face clear while bringing warmth through the case color.

The design reference is the Rolex Day-Date and the tradition of watches that display both the weekday and date. These are independent ModTime builds, hand-assembled to order. ModTime is not affiliated with Rolex or Seiko. The confirmed movement in these Day-Date builds is the Miyota 8285 automatic, so the actual movement specification is clear alongside the style name.

That day-and-date function gives the dial a purpose beyond its color. It is a choice for someone who likes a mechanical watch with calendar information in view, whether worn through the working week or brought into a smaller watch rotation. Start with the color and finish you want to look at every day, then compare the product photographs of that exact build.

The chocolate and rose-gold-tone olive versions let you explore warmer combinations. Tiffany blue shifts the attention toward the dial; the gold-tone white version balances the warm finish with a lighter face. None of those choices is a rule about who should wear the watch. Compare the whole design against your own clothes and the watches you already enjoy.

Before ordering, open the product page to check its listed size choices, available configuration and displayed price. Prefer a date-focused style with a different dial arrangement? Explore the Datejust-style ModTime collection as well.

Choose your build

For help comparing movements and calendar functions, read the custom watch movement guide.

Frequently asked questions

Who builds these Seiko Day-Date Mod watches?

ModTime hand-assembles these independent custom builds to order. The design is inspired by the Rolex Day-Date; ModTime is not affiliated with Rolex or Seiko.

Which movement is used?

The confirmed Day-Date builds use a Miyota 8285 automatic movement with weekday and date displays. Check the specification for the exact product you choose.

What does day-and-date mean?

The watch displays the day of the week and the date alongside the time. That calendar function is part of the confirmed Miyota 8285 configuration.

Which dial colors can I compare?

The collection includes chocolate, olive, Tiffany-blue and white dial builds. Use their product photographs to compare the dial against the actual case finish.

How do I choose the water-resistance option?

Select the standard 3 ATM build or the paid 5 ATM option on the product page, then check the displayed price for your chosen configuration.

Need Help?

Frequently Asked Questions

What is a custom ModTime watch?

A ModTime custom watch is an independently assembled watch built from compatible components around a chosen movement, case, dial and bracelet.

The term "MOD" comes from "modification". These modifications are generally made for those who wish to personalize their watch according to their specific tastes or needs. Modifications can vary considerably, from minor aesthetic changes to more complex technical revisions.

What makes Seiko watches particularly amenable to modification is the wide availability of spare parts. This abundance of components enables a wide range of customization, making each ModTime custom watch unique.

Which movements do we use?

At ModTime, we work exclusively with reliable, high-grade Seiko movements — trusted by watch enthusiasts worldwide for their precision and durability.

Each movement is carefully selected and tested by our watchmaker to ensure optimal performance and a smooth mechanical experience.

We use:

  • NH34 Automatic — for our GMT Mods
  • NH35 Automatic — for date dial builds
  • NH38 Automatic — for clean dial designs without a date
  • VK63 Mecha-Quartz — for chronograph models


Every ModTime watch is powered by a movement chosen for its accuracy, longevity, and craftsmanship — the foundation of every timepiece we create.

Can I adjust the watch size myself?

Absolutely! Every ModTime timepiece comes with a FREE complimentary premium adjustment kit, allowing you to resize your bracelet easily and safely at home.

Each tool is designed for precision and comfort — the same way our watches are crafted.

If you prefer, your local watchmaker can also assist you with the adjustment — our bracelets use standard Seiko-compatible links, making professional resizing simple and effortless.

Can I choose a clean or dial-marked version?

Yes — absolutely! Every ModTime timepiece can be fully customized to match your personal vision.

If you prefer a clean, minimalist dial without visible dial branding, our watchmakers will assemble your piece accordingly during the hand-crafting process.

Simply include your preference in the order notes at checkout, and we’ll ensure your watch is built exactly the way you want it — refined, personal, and uniquely yours.

Can I design my own watch?

Absolutely. At ModTime, every timepiece can be crafted to your personal vision — from the bracelet and case to the dial, hands, and finishing details.

You can even add your own logo or initials, turning your watch into a truly one-of-a-kind creation.

If you’d like to design a fully personalized ModTime piece, simply reach out to us on WhatsApp. Our watchmakers will guide you through every step of the customization process — from concept to final assembly.

Shipping Time and Costs

Free tracked shipping to the US. Import costs are included; there are no import surcharges on delivery. See checkout for the final order total.

Each watch is hand-assembled within 4-6 days to ensure the highest quality and attention to detail.

Once completed, the shipping time is 7-12 days, depending on your location. While we aim for prompt delivery, some variations may occur based on the destination.

Please note: Due to the current global shipping conditions, especially related to parcel traffic in and out of the US, delivery times may occasionally be slightly extended. However, we do everything on our side to ensure the fastest possible handling and dispatch.

Please note that delivery times may vary depending on the destination country.

Are the watches water resistant?

ModTime watches use variant-dependent water-resistance options such as 3 ATM or 5 ATM. 3 ATM is intended for daily splashes and rain. 5 ATM gives more everyday margin, but custom watches should still be kept away from swimming, bathing, diving and prolonged water exposure unless a specific model is explicitly rated for that use.

No answer matches that yet. Try a broader word — or reach our watchmakers on WhatsApp and we’ll help directly.