ONHARU User Guide

Fold the detailed event panel

Pressing the small arrow between the calendar and the detailed panel folds the panel and expands the calendar. Press again to unfold. Ctrl+B does the same thing. It stays out of the way while you are typing an event title or a search term.

1 week (hourly)

Selecting empty space chooses a one-hour block. Selecting an event highlights its full duration; overlapping events are each highlighted according to their own duration. When you drag an event to another time or date, the selection outline follows it to the new position.

Selecting, double-clicking to open an event, and checking a to-do's □ work the same in Move and Lock modes. Double-click an all-day or multi-day bar at the top to edit it, or drag the bar to another day to change its date. Events that cross midnight continue into the next day.

Double-click an existing event to open Edit event. The create and edit windows use the same fields in the same order.

Create an event

Edit an event

What you can do in a calendar cell

In Move mode, ONHARU behaves like a regular window. In Lock mode, it sits above the wallpaper and below desktop icons. Use the Move · Lock switch in the header. Lock mode requires ad-removal access.

Double-click an empty area in a date cell, or select + above the detailed calendar, to create an event.

Events and to-dos

An event happens at a time; a to-do is something you mark as finished. In ONHARU a timed event can carry a completion checkbox as well. Completion for local events and ordinary Google Calendar events is stored on this PC, and only Google Tasks items sync their completion status with Google.

Edit or delete an event

Double-click an event in either calendar to edit it. For a recurring event, choose which occurrences an edit, move, or deletion affects.

Completion check

Select the square beside a to-do in the detailed calendar to mark it complete. In Settings, choose how completed items appear: normal, faded, or hidden.

AnniversaryCounts recurring annual days

Select + on the Anniversary card in the detail panel. Enter its name and date without choosing a type, observing a count limit, or setting D-Day separately. Control anniversary D-Day display once under Anniversary display in Settings → Detail panel.

Where it is saved: When you are signed in to Google or Microsoft, the anniversary is saved both on this PC and in the connected account's default calendar. Without a signed-in account, it stays on this PC only. Changes and deletions made in the default calendar are reflected in ONHARU on the next sync.

Lunar dates: Enable Lunar date to read the month and day you enter as a lunar date. Enable Leap month when applicable. ONHARU shows the corresponding Gregorian date for this year and calculates the next occurrence.

Convert between events and anniversaries: Select Turn into an event in the anniversary window and confirm. In the event editor, enable Anniversary and save to turn a regular event into an anniversary.

★ Important anniversary: Choose the important mark and its fill and text colors. It appears with a star, bold text, and those colors on the calendar and Anniversary card, and moves forward when Important first is enabled.

Lunar markers are also stored in the connected account's default calendar. Exporting to CSV or ICS and importing again creates a regular Gregorian anniversary.

Frequently asked questions (FAQ)

Four top features

1Manage events · findSearch in title and memo

Search events in title and memo. You can narrow down the period, and Double-click the result will open that event.

2TimetableWeekly event arranged by days and periods

This is a weekly event arranged by days of the week and class periods. You can set the number of periods, class length, and break times, and you can click on a box to enter information directly.

3Alarm · TimerTime alarm and remaining time timer

Set an alarm for a specific time or a timer for a duration. A time written as 900, 0900, 9:00 or 9 is read as 09:00. Active alarms and timers are listed below.

Move and Lock

When locked, the calendar becomes part of the desktop and follows desktop behavior. Use Move mode for anything you need to drag into place, and double-click the ONHARU icon in the notification area to switch between the two modes at any time.

Everything else works the same in both states — wheel scrolling and period navigation, the transparency control, pop-up windows (Search, Settings, New event, Timetable, Alarm), and minimizing to the tray. In the locked main window you cannot type ordinary text or drag items.

Closing the app: The X button exits ONHARU completely. Minimizing to the tray only hides the window, so notifications and synchronization continue.

Choose the startup mode

Choose the startup mode in Settings: Previous mode, Always locked, or Always movable. Lock mode requires ad-removal access.

Notification area icon

ONHARU appears in Alt+Tab even in Lock mode. To bring a hidden calendar back, right-click its tray icon.

That menu gathers the window commands in one place.

Frequently asked questions (FAQ)

Select the gear to open Settings. The 12 cards are organized under four sections on the left: Display / Events & controls / Accounts & data / App. Selecting a section shows only its cards and opens the first one. Selecting a card opens that card alone, closes the others, and remembers the last card you viewed.

Select Save Settings to keep changes. The printer icon opens Print Preview, and the information icon opens product information.

Display

2Top buttons & slots

Function icons	Show or hide Search, Timetable, Alarm, and Timer. The Settings icon is always displayed.
Switch button	Show or hide the period, theme, and Move/Lock switches. The tray menu can change modes even when the switch is hidden.
Adjust transparency	Show or hide the transparency slider on the main screen.
Opacity applies to (from 2.2.25)	Sets what the opacity slider in the header makes transparent. Everything fades the whole window together, text and cards included; Background fades only the surfaces, so text, event bars and detail cards stay solid, which keeps them readable over the desktop. Everything to begin with.
ONHARU categories	Show or hide Work, Personal, User 1, and User 2. Rename the two user slots here.
Special Day	Choose whether D-Day and anniversaries appear in the detailed calendar.

3Main calendar

Week Display & Rules	Display week numbers and select the calculation basis. Choose among ISO, first Monday, or first Sunday. ISO counts the week containing the first Thursday of the year as the first week, while the others count from the first Monday or first Sunday of the year as the first week. The weekday of the first column is set separately under Week start & days off.
Lunar calendar, moon phase	Select the information shown beside dates and in hourly-week column headers. On holidays, only the moon-phase time is omitted to save space; the lunar date and phase symbol remain visible.
Calendar view	Set the 24-hour format, selected-day and today styling, font size, and finished-event appearance.
Highlight Selected Day·Today	Choose the highlighting method and color for the date. The hourly-week header uses the same Today setting, drawn as a pill to fit its longer date label.
Font size · Completed event	Choose the font size, and set completed events to normal, faded, or hidden.
Fade past events (from 2.2.25)	Shows events that ended before today in a lighter tone. Timed events fade once their end time has passed; all-day events fade once their end date has passed. An event that is also a finished to-do does not fade twice. Off to begin with.

Events & controls

Accounts & data

11Backup, manage & subscriptions

Import	Restore events from an automatic backup, dormant local data, or a JSON, ICS, or CSV file.
Export	Save events as JSON, ICS, or CSV. CSV includes Google events.
Manage events	Remove events in a selected range. Review the target and date range before confirming.
Calendar subscriptions	Add an ICS address (https:// or webcal://) and name, then choose Work, Personal, User 1, or User 2. Up to 10 calendars are supported. Choosing a user slot gives it the subscription name (up to 10 characters) and enables it. Its visibility checkbox stays in sync with that slot. Removing the last subscription using the slot clears its name and disables it.
Fetch now	Fetch subscriptions immediately without saving Settings. ONHARU also fetches them at startup and when Google sync runs. If a fetch fails, it keeps the last successful copy. The example address has a Copy address button.
Subscription limits	Subscribed events are read-only: they cannot be edited, moved, deleted, or given reminders. They are excluded from event backups and exports. Some recurrence exceptions and complex time-zone rules may differ from the source.
External backup folder	Pick a USB or cloud-sync folder and ONHARU also writes a copy of the event and settings backup to ONHARU-Backups inside it. Choose Off to stop.

App

Updates

With Check for updates enabled, ONHARU asks before installing only when a newer release exists. If you approve, it downloads the installer and installs over your current version; nothing is installed without your confirmation. Your events, settings, connection data, and automatic backups are stored separately from the program, so an update keeps them. For important data, use Export once more before updating.

Frequently asked questions (FAQ)

Select Connect a calendar account at the top of the detail panel, then choose Continue with Google or Sign in with Microsoft. Finish signing in and approve access in your browser. ONHARU connects one account at a time; sign out before choosing another account or provider.

You can use it without connecting

Connecting an account is optional. Local events, to-dos, D-Day entries, anniversaries, alarms, timetables, and backups all work without one.

What changes when connected

• The list of calendars from the connected account appears in the detail panel, and each calendar can be turned on and off.
• The New Event window can save to an editable Google or Outlook calendar.
• Google connections can show Tasks and contact birthdays. These items are unavailable with Microsoft.
• Calendars shared as read-only are marked Not editable and cannot be changed.

Local events and connected events

Connected events stay in step with the Google or Outlook calendars you select, while Work and Personal events remain on this PC. When you are signed in, anniversaries are saved in both places. Editing or deleting on one side is reflected on the other at the next sync. Restoring a local backup never overwrites the original events in a connected account.

Google Tasks

It is off at first. Enable Google Tasks display and sync in Settings and review the notice; the task list and its synchronization then appear. If you granted access to a task list when signing in, ONHARU can create tasks and edit their title, date, notes, and completion. For tasks created in Google, only the completion mark can be changed.

ICS calendar subscriptions

Under Calendar subscriptions in Settings, enter an HTTPS or webcal address and a name, then choose whether it lands in Work, Personal, User1, or User2. You can add up to ten, read-only. Fetch now reaches the calendar without saving, and feeds also refresh when the app starts and when it synchronizes. If a fetch fails, the events last received stay visible. Subscribed events are not included in backups or exports.

Export and import

JSON holds local events exactly as they are, for backup; ICS exchanges events with other calendar apps; CSV is for reviewing or editing in Excel. Before importing, you can choose and confirm which items to add.

Data is separated by account

Each connected account has its own events. Signing out does not delete events stored locally in ONHARU.

When the internet is disconnected

Events are saved on this PC first. When the connection returns, they are uploaded to the selected provider. ONHARU identifies events that are still waiting to sync.

Moving to another PC

1. Use Export in Settings to save your events to a file.
2. Install ONHARU on the new PC.
3. Open Import in Settings and select the exported file.

Frequently asked questions (FAQ)