Tell visitors when you are open — from one settings screen. ZA-ONE Business Calendar shows a monthly calendar of your closed days and an opening hours table on any page, with a block or a shortcode. The same settings can also output LocalBusiness structured data (JSON-LD) for search engines.

It is made for small shops, salons, restaurants and clinics that have regular closed days (“closed every Wednesday and on the 2nd and 4th Tuesday”), yearly breaks and the occasional change.

What you can set

Regular closed days — every week (e.g. every Wednesday) and the n-th weekday of each month (e.g. the 2nd and 4th Tuesday; a 5th weekday matches only in months that have one).
Public holidays (Japan) — show them on the calendar, and choose whether you are closed, open, or follow the usual weekday rule on holidays. Japanese public holidays are calculated locally (fixed dates, Happy Monday holidays, equinox days, substitute holidays and citizens’ holidays, 2000–2099). No external calendar is downloaded.
Closed every year — periods such as 12-29 01-03 Year-end holidays (a period can cross the new year).
Temporarily closed and open on a usual closed day — single dates with an optional label.
Opening hours — up to two time slots per weekday (for a lunch break), with a “copy Monday to every day” button and a note line.
Display — number of months (1–3), first day of the week, legend on/off, label texts and three colors.
Easy to set up — a “getting started” card with three steps, dates picked from a calendar (or typed as text, also as 2026/11/20 or 12/29~1/3), checks while you type, and a preview that updates before you save.

When rules overlap, the order is: open on a usual closed day temporarily closed closed every year public holiday regular closed days open.

Show it on your site

Blocks: Business Calendar (months, legend, previous / next buttons) and Business Hours (note, combined days, today’s hours), in the Widgets category. The editor shows the real output.
Shortcodes: [zaone_calendar months="2" start="" legend="1" nav="1"] (start is YYYY-MM; empty = this month) and [zaone_hours note="1" merge="1" status="1"].
Move to the previous and next months — visitors can look up to 12 months ahead, without reloading the page.
Today’s hours and “Open now” — a line such as “Today, Nov 9 (Mon): 10:00–19:00” above the opening hours, with an “Open now” / “Closed now” badge.
Days with the same hours shown together — for example “Mon–Fri 10:00–19:00” in one row (can be turned off). Closed n-th weekdays are noted, e.g. “(closed on the 2nd, 4th Tuesday)”.
The calendar uses <caption>, column headers and screen-reader text for every closed or special day, and closed days have a line along the bottom, so the information does not depend on color alone. The legend shows only the kinds of days in the months shown.
Works on dark themes, and prints two months side by side.
“Today” is marked on the server and re-marked with the visitor’s date by a tiny script, so it stays right on cached pages.
One small CSS file that inherits your theme’s fonts. Two or more months sit side by side and stack on phones.

Structured data (optional, off by default)

When enabled, a LocalBusiness (or a more specific type such as HairSalon, Restaurant or Dentist) JSON-LD block is added to the home page or to every page, with the name, URL, telephone, image, address, openingHoursSpecification (weekdays with the same hours are grouped) and specialOpeningHoursSpecification for closures and special openings in the next 90 days.

Built by

ZA-ONE builds websites for small businesses in Japan. If you would like a website for your shop, see zone-web.jp.

Planned for later versions

Several locations, hours past midnight, shorter hours on specific days, events and bookings, public holidays of other countries, calendar sync, PDF output.

External services

This plugin does not connect to any external service. Japanese public holidays are calculated locally.