The {{Infobox Holiday}} template adds an infobox with data fields for defining a particular holiday.

{{Infobox holiday
|holiday_name  = required
|type          = required
|image         = 
|imagesize     = 
|caption       = 
|official_name = 
|nickname      = 
|observedby    = 
|litcolor      = 
|longtype      = 
|significance  = 
|begins        =
|ends          =
|date          =
<!-- Use next three if holiday is the same day of the same week every year -->
|week_ordinal              = <!-- "first", "second", "last", etc. -->
|weekday                   = <!-- "Sunday", "Monday", "Friday", etc. -->
|month                     = <!-- "January", "February", "December", etc. -->
<!-- Use next three if the date changes in an unusual pattern each year -->
|date{{#time:Y|last year}} = <!-- only for days that change each year -->
|date{{#time:Y}}           = <!-- only for days that change each year -->
|date{{#time:Y|next year}} = <!-- only for days that change each year -->
|celebrations  =
|observances   = 
|relatedto     =
}}
holiday_name
This is the most common holiday name, which appears at the top of the infobox. It should almost always be the name of the article.
type
The type of the holiday, for example: national, judaism, islamic, etc. The type parameter has this relation:
Type (param "type") Color
islam, islamic LightGreen
judaism, juda, jewish, jew LightSkyBlue
buddhism, buddhist, buddha PaleGoldenRod
christian, christ, christianity Lavender
asian, asian festival RosyBrown
secular DarkGray
national, international, local, group LightViolet
historical, cultural, patriotic, ethnic LightSalmon
pagan DarkKhaki
commercial Yellow
hindu, hinduism Orange
shinto, shintoism Red
default LightSteelBlue
begins
required for multi-day holidays - This is the starting date for a multi-day holiday.
ends
required for multi-day holidays - This is the ending date for a multi-day holiday.
date
required for single-day holidays - This is the date of a single-day holiday. (If you use the week_ordinal/weekday/month parameters below, date will default to a phrase like "First Sunday in January". Otherwise it has no default and is required.)
date2024
highly recommended for holidays that don't stay on the same Gregorian date - This is the Gregorian date on which the holiday will occur in 2024. At the end of 2024, this will be replaced with date2025, which will later be replaced with date2026. Therefore, it's a good idea to specify the Gregorian date for a few future years. (Not necessary if week_ordinal/weekday/month are specified instead.)
image
This should be an image that represents the holiday. The value is just the simple target-name, not a full wikilink.
imagesize
The size of the image (default is 225px).
caption
This is a caption that describes the image.
official_name
This should contain the official name of the holiday if it is not the holiday_name; this can also be the name of the holiday in its original language
nickname
This should hold any nicknames, alternatives, and translations for the holiday_name or official_name
observedby
highly recommended - These are the people who celebrate/observe the holiday (e.g. Muslims and Islam, United States, people worldwide)
litcolor
This is the liturgical color of the day, if applicable to a religious holiday; or other color which is applicable to the holiday (eg. green for Saint Patrick's Day)
longtype
This is a lengthier description of the type, for example if there are two types that could be defined, for example "Cultural, Historical, Islamic"
significance
This is a lengthier description of the holiday's significance
week_ordinal, weekday, month
For days that are observed on the same day of the same week every year, these specify the week (week_ordinal), day of the week (weekday), and month. If you use these, you no longer have to specify date2023, date2024, date2025, etc. If you specify week_ordinal, then weekday and month are required also.
date2023, date2025
recommended for holidays that don't stay on the same Gregorian date - The template will display the previous and next year's dates along with that of the current year, if they are provided. Again, it's a good idea to provide dates for a few years further into the future as well. (Not necessary if week_ordinal/weekday/month are specified instead.)
celebrations
This contains the celebrations that occur on the holiday.
observances
This contains essentially the same thing as the celebrations attribute. However, the word observances is used. This may be more appropriate than celebrations when referring to prayer or more solemn observances. Most likely, you will not need both celebrations and observances.
relatedto
This contains holidays that relate to the current holiday.
{{Infobox holiday
|holiday_name  = Nice Safe Day
|type          = national
|official_name = The Nice Safe Holiday Day
|nickname      = The Nice & Safe Day
|observedby    = [[Atlantis]]
|significance  = The Nice Safe Day for everyone
|date          = [[January 31]]
|celebrations  = The Nice Safe Day parade
|relatedto     = [[Unsafe Day]]
}}
Nice Safe Day
সম্পূৰ্ণ নাম The Nice Safe Holiday Day
অন্য নাম The Nice & Safe Day
পালন কৰে Atlantis
প্ৰকাৰ National
মহত্ব The Nice Safe Day for everyone
তাৰিখ January 31
উদযাপন The Nice Safe Day parade
সম্পৰ্কিত Unsafe Day

Same day of same week every year

সম্পাদনা কৰক
{{Infobox holiday
|holiday_name  = Puzzle Saturday
|type          = secular
|image         = Wikipedia-logo-blank.png
|caption       = Commonly seen puzzling encylopedia
|official_name = The Official Puzzle Saturday
|observedby    = [[United States]]
|longtype      = State holiday
|week_ordinal  = last
|weekday       = Saturday
|month         = August
}}
Puzzle Saturday
Puzzle Saturday
Commonly seen puzzling encylopedia
সম্পূৰ্ণ নাম The Official Puzzle Saturday
পালন কৰে United States
প্ৰকাৰ State holiday
তাৰিখ Last Saturday in August
২০২৩ৰ তাৰিখ August এক্সপ্ৰেছন ত্ৰুটী: অবাঞ্চিত < অপাৰেটৰ
২০২৪ৰ তাৰিখ August এক্সপ্ৰেছন ত্ৰুটী: অবাঞ্চিত < অপাৰেটৰ
২০২৫ৰ তাৰিখ August এক্সপ্ৰেছন ত্ৰুটী: অবাঞ্চিত < অপাৰেটৰ

Different days and dates each year

সম্পাদনা কৰক
{{Infobox holiday
|holiday_name  = Inscrutable Day
|type          = cultural
|official_name = Day of the Phantom Inscrutable Cheese
|observedby    = [[Chicago]], [[Illinois]]
|date          = Five days after every 13th moon
|date2009      = June 8
|date2010      = June 27
|date2011      = July 12
|observances   = Night of the Moon Cheese
}}
Inscrutable Day
সম্পূৰ্ণ নাম Day of the Phantom Inscrutable Cheese
পালন কৰে Chicago, Illinois
প্ৰকাৰ Cultural
তাৰিখ Five days after every 13th moon
আচাৰ Night of the Moon Cheese