docs: remove redundant h1 headings from all docs pages

knowledgecode · knowledgecode · commit f63a74a0da52 · 2026-04-29T17:53:26.000+09:00
Starlight automatically renders the frontmatter title as the page h1,
so the explicit # Heading lines were duplicate and visually redundant.
diff --git a/docs/api/addDays.md b/docs/api/addDays.md
@@ -2,8 +2,6 @@
 title: addDays()
 ---
 
-# addDays()
-
 Adds or subtracts days from a Date object. Handles month boundaries, leap years, and daylight saving time transitions properly.
 
 ## Syntax
diff --git a/docs/api/addHours.md b/docs/api/addHours.md
@@ -2,8 +2,6 @@
 title: addHours()
 ---
 
-# addHours()
-
 Adds or subtracts hours from a Date object.
 
 ## Syntax
diff --git a/docs/api/addMilliseconds.md b/docs/api/addMilliseconds.md
@@ -2,8 +2,6 @@
 title: addMilliseconds()
 ---
 
-# addMilliseconds()
-
 Adds or subtracts milliseconds from a Date object.
 
 ## Syntax
diff --git a/docs/api/addMinutes.md b/docs/api/addMinutes.md
@@ -2,8 +2,6 @@
 title: addMinutes()
 ---
 
-# addMinutes()
-
 Adds or subtracts minutes from a Date object.
 
 ## Syntax
diff --git a/docs/api/addMonths.md b/docs/api/addMonths.md
@@ -2,8 +2,6 @@
 title: addMonths()
 ---
 
-# addMonths()
-
 Adds or subtracts months from a Date object. Handles month boundaries, leap years, and varying month lengths appropriately.
 
 ## Syntax
diff --git a/docs/api/addSeconds.md b/docs/api/addSeconds.md
@@ -2,8 +2,6 @@
 title: addSeconds()
 ---
 
-# addSeconds()
-
 Adds or subtracts seconds from a Date object.
 
 ## Syntax
diff --git a/docs/api/addYears.md b/docs/api/addYears.md
@@ -2,8 +2,6 @@
 title: addYears()
 ---
 
-# addYears()
-
 Adds or subtracts years from a Date object. Handles leap years and edge cases appropriately.
 
 ## Syntax
diff --git a/docs/api/compile.md b/docs/api/compile.md
@@ -2,8 +2,6 @@
 title: compile()
 ---
 
-# compile()
-
 Precompiles a format string into a reusable compiled object for improved performance when the same format pattern is used repeatedly.
 
 ## Syntax
diff --git a/docs/api/format.md b/docs/api/format.md
@@ -2,8 +2,6 @@
 title: format()
 ---
 
-# format()
-
 Formats a Date object according to the specified format string.
 
 ## Syntax
diff --git a/docs/api/index.md b/docs/api/index.md
@@ -2,8 +2,6 @@
 title: API Reference
 ---
 
-# API Reference
-
 Welcome to the comprehensive API reference for date-and-time v4.x. This section provides detailed documentation for all available functions, types, and options.
 
 ## Core Functions
diff --git a/docs/api/isValid.md b/docs/api/isValid.md
@@ -2,8 +2,6 @@
 title: isValid()
 ---
 
-# isValid()
-
 Validates whether a date string conforms to the specified format pattern and represents a valid date.
 
 ## Syntax
diff --git a/docs/api/parse.md b/docs/api/parse.md
@@ -2,8 +2,6 @@
 title: parse()
 ---
 
-# parse()
-
 Parses a formatted date string into a Date object according to the specified format pattern.
 
 ## Syntax
diff --git a/docs/api/preparse.md b/docs/api/preparse.md
@@ -2,8 +2,6 @@
 title: preparse()
 ---
 
-# preparse()
-
 Pre-parses date strings and returns intermediate parsing results. This function is useful when you need to examine parsing details before creating a final Date object.
 
 ## Syntax
diff --git a/docs/api/subtract.md b/docs/api/subtract.md
@@ -2,8 +2,6 @@
 title: subtract()
 ---
 
-# subtract()
-
 Calculates the difference between two Date objects and returns a rich Duration object with multiple time units and formatting options.
 
 ## Syntax
diff --git a/docs/api/transform.md b/docs/api/transform.md
@@ -2,8 +2,6 @@
 title: transform()
 ---
 
-# transform()
-
 Transforms date strings from one format to another. This is a convenience function that combines parse() and format() operations.
 
 ## Syntax
diff --git a/docs/api/utils/getDaysInMonth.md b/docs/api/utils/getDaysInMonth.md
@@ -2,8 +2,6 @@
 title: getDaysInMonth()
 ---
 
-# getDaysInMonth()
-
 Returns the number of days in a given month of a specific year. Correctly handles leap years when calculating February.
 
 ## Syntax
diff --git a/docs/api/utils/getISOWeek.md b/docs/api/utils/getISOWeek.md
@@ -2,8 +2,6 @@
 title: getISOWeek()
 ---
 
-# getISOWeek()
-
 Returns the ISO 8601 week number (1–53) for a given date. ISO weeks start on Monday, and week 1 is the week containing the first Thursday of the year.
 
 ## Syntax
diff --git a/docs/api/utils/getISOWeekYear.md b/docs/api/utils/getISOWeekYear.md
@@ -2,8 +2,6 @@
 title: getISOWeekYear()
 ---
 
-# getISOWeekYear()
-
 Returns the ISO 8601 week year for a given date. The ISO week year may differ from the calendar year near the start and end of the year, because ISO weeks always start on Monday and the first week of the year is the one containing the first Thursday of the year.
 
 ## Syntax
diff --git a/docs/api/utils/isLeapYear.md b/docs/api/utils/isLeapYear.md
@@ -2,8 +2,6 @@
 title: isLeapYear()
 ---
 
-# isLeapYear()
-
 Determines if a given year is a leap year according to the Gregorian calendar rules.
 
 ## Syntax
diff --git a/docs/api/utils/isSameDay.md b/docs/api/utils/isSameDay.md
@@ -2,8 +2,6 @@
 title: isSameDay()
 ---
 
-# isSameDay()
-
 Checks if two Date objects represent the same calendar day, regardless of time.
 
 ## Syntax
diff --git a/docs/guide/index.md b/docs/guide/index.md
@@ -2,8 +2,6 @@
 title: Introduction
 ---
 
-# Introduction
-
 **date-and-time** is the simplest, most intuitive date and time library for JavaScript and TypeScript. Built from the ground up with modern development practices, it provides a comprehensive set of tools for date manipulation, formatting, parsing, and timezone handling.
 
 ## Why date-and-time?
diff --git a/docs/guide/quick-start.md b/docs/guide/quick-start.md
@@ -2,8 +2,6 @@
 title: Quick Start
 ---
 
-# Quick Start
-
 This guide will get you up and running with date-and-time in just a few minutes.
 
 ## Basic Example
diff --git a/docs/migration.md b/docs/migration.md
@@ -2,8 +2,6 @@
 title: Migration Guide
 ---
 
-# Migration Guide
-
 Version `4.x` has been completely rewritten in TypeScript and some features from `3.x` are no longer compatible. This section explains the changes to each feature and the migration methods.
 
 ## Installation
diff --git a/docs/plugins.md b/docs/plugins.md
@@ -2,8 +2,6 @@
 title: Plugins
 ---
 
-# Plugins
-
 `date-and-time` adopts a plugin system. Special tokens used relatively infrequently are provided as plugins outside the main library. By adding plugins as needed, you can use those tokens in `Formatter` and `Parser`. Here, `Formatter` refers to the output engine used by the `format` function, and `Parser` refers to the parsing engine used by the `parse`, `preparse`, and `isValid` functions. These engines are extended by adding plugins as arguments to these functions.
 
 ## Installation
