Date-based formatting in Google Sheets - Step-by-Step Guide

Introduction

Date-based formatting helps you change how cells look depending on the dates they contain. This makes it easy to spot important dates like deadlines or upcoming events in your spreadsheet.

When you want to highlight all dates that are past today to see overdue tasks.

When you need to mark upcoming birthdays within the next week in your contact list.

When you want to color-code dates that fall on weekends to plan work schedules.

When you want to show all dates in the current month with a special color.

When you want to highlight holidays or special events automatically based on date.

Steps

Step 1: Select the cells containing dates you want to format

- Spreadsheet grid

The selected cells are highlighted

💡 Click and drag to select a range or click the column letter to select a whole column

Step 2: Click Format

- Top menu bar

Format menu opens

Step 3: Select Conditional formatting

- Format menu

Conditional format rules pane opens on the right side

Step 4: Under Format cells if, click the dropdown and choose a date-based rule like 'Date is before', 'Date is after', or 'Date is exactly'

- Conditional format rules pane

The rule options update to let you specify the date condition

Step 5: Enter the date or use formulas like =TODAY() to set dynamic dates

- Value or formula input box in the conditional format rules pane

The rule is set to compare dates in the selected cells

Step 6: Choose a formatting style like fill color or text color

- Formatting style section in the conditional format rules pane

The preview shows how the cells will look if they meet the condition

Step 7: Click Done

- Conditional format rules pane

The formatting is applied to the selected cells based on the date condition

Before vs After

Before

Column A shows dates like 2023-05-01, 2023-06-15, 2023-07-20 with no special colors

After

Dates before today are highlighted with red fill color, making overdue dates easy to see

Settings Reference

Format cells if

📍 Conditional format rules pane

Choose the date condition that triggers the formatting

Default: None

Formatting style

📍 Conditional format rules pane

Select how the cells will look when the condition is true

Default: No formatting

Common Mistakes

Using text format cells instead of date format

Date-based rules only work correctly if cells are recognized as dates, not text

Make sure cells are formatted as Date by selecting Format > Number > Date before applying conditional formatting

Typing dates in the wrong format in the rule

Google Sheets expects dates in a standard format or as formulas like =TODAY()

Use the date picker or formulas like =TODAY() to avoid format errors

Not selecting the correct range before applying the rule

The formatting will not apply to the intended cells if the wrong range is selected

Carefully select the exact cells or column that contain the dates before starting conditional formatting

Summary

Date-based formatting changes cell appearance based on date conditions to highlight important dates.

Use built-in date rules or custom formulas to create dynamic date highlights.

Ensure cells are formatted as dates and select the correct range for the formatting to work properly.