Everyday tool

Calendar

Browse a local month calendar with today highlighted. Prev, Next, and Today controls—no account required.

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How to use

Follow these steps for a clear answer.

Use Prev / Next to change months; Today jumps back to the current month.

The current day is highlighted in the grid.

The calendar runs on your device—no account or sync required.

Version 2.0.0 · Last reviewed 2026-07-28

Definition: A month calendar lays out the days of a chosen month in a seven-column week grid.
What it calculates: Day cells for a viewed year-month, with today highlighted when in view.
Inputs: Prev / Next month
Today (jump to current month)
Outputs: 7×N day grid
Month and year label in status
Formula: firstDow = weekday of day 1; days = last day of month
The Calendar shows a clean month grid with today highlighted. Switch months with Prev and Next, or press Today to jump back. The month grid sits in the main panel so it is usable on a phone’s first screen.
Assumptions: Uses the device local timezone Date.
Week starts on Sunday.
Units: Calendar days
Boundary conditions: Months with fewer than 31 days show fewer cells.
Today highlight only when the viewed month is the current month.
Example: July 2026 grid with the 28th highlighted if today is July 28, 2026
Validation cases: Next from January → February of same year
Today → Current local month
Sources: ECMAScript Date month arithmetic
Last reviewed: 2026-07-28
Calculation version: 2.0.0

Key distinctions behind the tool.

Does this calendar sync events?

No. It is a month grid for browsing dates on your device—no cloud calendar sync.

How do I jump to today?

Press Today to return to the current month with today highlighted.

Which week starts on Sunday?

The grid uses Sunday-first columns (Su–Sa).

Is my data uploaded?

No. The calendar is generated locally from your device date.