Questions tagged [date]
This challenge is intended to be solved by using, manipulating, accepting as input, outputting, or calculating calendar dates or clock times.
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Fast leap year check
The task is to find parameters that make a fast leap year check correct for the widest range of years.
We assume the Proleptic Gregorian calendar, which extends the Gregorian calendar backward from ...
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Is it a date format of YYMMDD, MMDDYY, and/or DDMMYY?
The date format varies between countries; the arrangement of date, month and year can be categorized into these three:
Year-month-date
Month-date-year
Date-month-year
In Gregorian calendar it's year ...
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How many people are awake?
The following data contains the (approximate) population of each UTC timezone in the world (source):
...
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Format Datetime in 30-Hour Clock Time
Input a datetime, format the datetime in YYYY-MM-DD HH:mm:ss format using 30-hour clock time.
The 30-hour clock time works as:
After 6 a.m., it is same as 24-hour ...
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Output 5-line calendar
Given year, month and optionally weekday of 1st, output the calendar of the month. The first week should remain nonempty.
For empty cell, fill it with the date where it's supposed to be, in last or ...
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Write the date in abbreviated Latin
Inspired by How do you write dates in Latin?
Challenge
Given a month-and-day date, output that date in abbreviated Latin, as explained below.
Input
Input is flexible, following conventions from other ...
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Decode the date in Christmas Eve format
This is the inverse of "Encode the date in Christmas Eve format."
Write a program that takes as input the string Christmas, possibly followed by ...
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Last Week Day Of The Month
Introduction
This challenge was inspired by a seemingly simple task requested at work that couldn't easily be done in Microsoft Teams. At least not from what we could find!
Task
Your task, if you ...
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Spell date in Japanese
Objective
Given a date, spell it out in Romanized Japanese.
I/O Format
The input format is flexible. The output format is <month spelling> <day spelling>...
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Output each second
With roughly one second (plus or minus 10 ms) between outputs, output anything.
The first output must be at most one second after the start of the program, but can be as soon as right when the program ...
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Get the date of the Nth day of week after the Xth day of week in a given year and month
Introduction
In the United States, national elections are normally held on the first Tuesday after the first Monday in November.
Challenge
Write a program that takes a Year as integer, and a pair of (...
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Next Time Of Given Pattern
Introduction:
Some times using a 24-hour clock are formatted in a nice pattern. For these patterns, we'll have four different categories:
...
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Which weekday was it?
This challenge, I hope, is simple to understand. Given a date-string (given in any format you prefer, so long as it has 4 digits of year and 2 digits of day and month), calculate the weekday for the ...
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Universal Unicode Clock
Plot contrivance
You wake up to find that something has gone horribly wrong! Your time machine has malfunctioned and you are lost sometime between June 2022 and October 1991.
You check the computer ...
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Which Western Zodiac sign is today?
Task:
With the minimum amount of bytes, determine today's Zodiac sign using the programming language of your choice.
Rules:
This is code golf, the answer with the fewest characters wins. The ...
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