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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Percentage of work days in a month
Given a year and a month, find out the percentage of work days in said
month. Work days are Monday through Friday with no regard to holidays or
other special things. The Gregorian calendar is used.
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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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How many friday the 13th in a year?
Your challenge is to write a program which, given a year, outputs the number of "Friday 13ths" in it.
Rules & Details:
You can take input via STDIN, or as an ...
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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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Sleep for 1000 years
Some sleep commands implement a delay of an integer number of seconds. However, 2³² seconds is only about 100 years. Bug! What if you need a larger delay?
Make a ...
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Print a word clock
Since I saw the first one a few years ago, I always was subjugated by this kind of word clock where the time is actually spelled out by words being lit up or not into a meaningful sentence.
The text ...
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Find the nearest Date, given a TargetDate and Day of Week
Find the nearest Date to a TargetDate for a given Day of Week.
For example, given a date of 20161219 and a day of week of ...
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Encode the date in Christmas Eve format
The day this post was published was Christmas Eve. Tomorrow will be Christmas. Yesterday was Christmas Eve Eve. In two days it will be
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Draw a BCD Binary clock
Create a BCD binary clock
in ASCII. As implied, it shall display time in six columns of dots:
(source: Wikimedia Commons)
Each column is a binary-coded digit, reading hours, minutes and seconds
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Return the clock emoji closest to the current time when run
I can have a large if/else condition for each 30 minutes but I'm looking for more math and Unicode based solution.
Here are clock emojis:
🕐🕑🕒🕓🕔🕕🕖🕗🕘🕙🕚🕛🕜�...
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Calculate the day number of the year
Seems like we do not have this one yet, so here we go:
The Challenge
Write a program or function that takes a date as input and outputs the day number of the year. You may not use any builtins for ...
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Is it a leap year?
This challenge is quite simple. You will take an input which will be a year from 1801 to 2400, and output if it is a leap year or not.
Your input will have no newlines or trailing spaces:
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Happy Birthday, Finland!
Introduction
As is known, in 2017, Finland celebrates its 100 years of independence. To mark the occasion, it is your job to produce a Finnish flag for everyone's enjoyment.
Challenge
Create a ...
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What's the time, chap?
I honestly cannot believe that this is not a question yet on Code Golf, but....
Print the local time (with a.m. or p.m.) as a string to the console, preceded by "It's ".
Example:
...
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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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Advance Happy New Year, 2016!
Your input will be a integer between 1970 and 2090 (inclusive), representing a year. Your program should output the next year on which New Years Day falls on the same day of the week as the input year....
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Days in indexed month
This simple challenge is very similar to this one: How many days in a month? The only difference is you yield the number of days in a month given the index of the month instead of its name.
The ...
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Is it Christmas?
Challenge
Given that Christmas is:
December
Month 12
Day 25
Every year, determine today's date, and whether or not today is Christmas.
If it is Christmas, you must print ...
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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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Pi Day, Pi Minute, or Pi Second?
In this challenge you will need to determine whether it's Pi Day, Pi Minute, or Pi Second.
Because Pi is irrational, it wants your code to be as short as possible.
Examples
No input is provided, ...
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The Work Day Countdown
I just had a genius idea for making the work-life easier - a countdown to a specific date which only counts workdays.
The basic task is to create a countdown to a specific date which only includes ...
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Convert YYYYMM to MMMYY
Basing on this SO question.
Challenge is rather simple: given a date period in the format YYYYMM output it in the format MMMYY.
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It's [current year] already, folks, go home
On most new-years challenges when it is currently not the corresponding year of the challenge, It says this in the front.
It's [current year] already, folks, go home.
You have to output this text ...
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List of possible birth years of living humans
The Challenge
Output a list of years that starts with the current year and ends 120 years ago. The birth year of every living human would be included in this list.
Details
The list should be in ...
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What's the Date?
Challenge
Weirdly, this hasn't been done yet: output the current date.
Rules
The date format you should follow is as follows:
YYYY-MM-DD
Where the month and ...
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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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Increment The Time
Every digital clock contains a small creature that has to advance the time every minute [citation needed]. Due to the popularty of digital clocks and the popularity of catching them in the wild, they ...
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Output the Current Time
Challenge
You must output the current time continuously (until cancelled by an interrupt), once every second, by any of the following means:
It must be in 24-hour or AM/PM format.
If it is the ...
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Sort the months of the year
Write a function or program that takes string inputs, fully-spelled, English month names in title case: January, February, ...
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Output ISO8601 date
The Task
Given the positive value of unix timestamp output any of two valid ISO 8601 time formats:
YYYY-MM-DDTHH:mm:SS or, alternatively,
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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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Get the date of the nth day of week in a given year and month
Introduction
Often, people refer to dates as the "second Friday in August, 2018" or the "fourth Sunday in March, 2012". But it's hard to tell what date that is! Your task to is to ...
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Get the day of the year of a given date
Challenge
Given two positive integers \$1 \le m \le 12\$ and \$1\le d \le 31\$, representing a month and days into the month, output the amount of days that have passed since January 1st, on a non-...
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How long until this date?
The idea is this: Write a function to print the length of time from now/today's date (at the time the function is called) until a date supplied as an argument.
Assumptions:
Input date will always be ...
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The Time Traveler
The shortest code to generate the correct times on the clocks wins.
You are a seasoned time traveler and have been known to stop at many planets during your journies. Each planet rotates at a ...
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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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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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A Fractional Year
My PPCG holiday is over :D
Intro
Fractional time is the year + (the value (minute of year) / number of minutes in the year).
Example calculation
You should ...
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Calculate Swatch Internet Time
Output the current time of day as Swatch Internet Time.
Specifically, output a three-digit (zero-padded) number of ".beats" (1000ths of a day) which represent the current time of day in the Swatch ...
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Output ISO8601 date string from seconds and nanoseconds
One reason why ISO8601 is the best date string format, is that you can simply append as much precision as you like. Given 2 integers representing seconds and nanoseconds that have passed since ...
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What year will it be in n seconds?
You are given an integer n as input, and, regardless of the current date, must return the calendar year (Gregorian calendar, other calendars not allowed) taking ...
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What's the day today (or other dates)?
Task
Write a program or a function that calculates a week-day name of a date which a user inputs.
Input & Output
Input is a string, YYYYMMDD.
Example of ...
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It's time for a clock challenge!
I'd like you to build me a clock that displays time in this format:
18 ----------
19 --------------------------------------------------
This displays '18:10'. The ...
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Pause twice as long
Your challenge is to print the input, wait any amount of time, print the input, wait twice the time you initially waited, print the input again, and so on. The initial delay must be less than 1 hour, ...
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When will Brexit happen?
Well, Brexit happened. And Sky News, being the geniuses they are, have decided to create a countdown on the side of a bus.
Your job is to do something similar. The UK leaves the the EU on 31st of ...
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Analog is Obtuse!
An analog clock has 2 hands*: Hour and minute.
These hands circle the clock's face as time goes by. Each full rotation of the minute hand results in 1/12th of a rotation of the hour hand. 2 full ...
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These Days Work for Me
Background
You're an attractive code golfer and quite a few people are asking you out.
You don't have time to think about which days exactly you're available, so you decide to create a function the ...
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Implement a Simple Stopwatch
Challenge
Your task is to write a program which, once a second (including immediately when your program is started), prints the elapsed time from the time your program was started.
Rules
Time must ...
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I'm too cold, turn up the temperature
This is my first golf contest.
What you need to do
Build me, in the shortest amount of bytes possible, my AC remote control system. My room is too cold right now, and I'm missing my remote.
Now, I ...
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Track listings to time tables
Introduction
Don't you hate it when someone uploads an album you like to YouTube, but the description only contains a track listing? Like this:
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