Questions tagged [date]
This challenge is intended to be solved by using, manipulating, accepting as input, outputting, or calculating calendar dates or clock times.
279
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Big Ben goes BONG
Your task is to create a program that is to mimic Big Ben (Twitter).
Task
Whenever a new hour has begun (according to your computer's local time or UTC), you have to output ...
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votes
4
answers
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Holiday Headache
Warning: DO NOT take medical advice from this post. If you want medical advice, go to a qualified professional.
I have a headache. I need headache pills.
I'll tell you the last few doses I've had, and ...
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votes
28
answers
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Merry Golfmas, Everyone!
It's Christmas everybody, and here's a code-golf challenge to celebrate. You need to make a program to print out a present. Specifically, the words "Merry Christmas". BUT, there is a catch: this ...
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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 ...
user59331
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votes
9
answers
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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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3
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Are we then yet?
I'm a time traveler, and I'm obsessed with the passage of time. I particularly love the moments when the clock hands pass 12, or when I get to flip to the next page of my calendar, or when everyone ...
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For a given period, getting the smallest list of dates, using jokers
Consider a date formatted in YYYY-MM-DD.
You can use the joker * at the end of the date string. E.g. ...
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The Last Monday
Monday, October 31st, is Halloween. And it got me thinking -- I wonder what other months have the last day of the month also be a Monday?
Input
A positive integer in any convenient format ...
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7
votes
3
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World Time Conversion
World Time Conversion
Challenge:
Given an initial clock time in UTC and a list of countries: for each country in the list, output the local time it is in that country based on the initial time. In ...
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votes
12
answers
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Change the Timezone
Challenge
Given a time and a timezone as input, output the time in that timezone.
Time
The time will be given in 24 hour format like so:
hh:mm
Where hh is the ...
- 23.3k
3
votes
1
answer
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Are you a Fanatic?
Write a function or program that awards you SE badges. If an input "Q" is given it means you have asked a question. If no input is given it means you have only visited the site.*
Badges it must ...
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votes
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When is their birthday?
Donald Knuth was born in 1938, on the 20th day of Capricorn.
The first day of Capricorn is the 22nd December.
Donald Knuth was born on the 10th of January (1938).
The challenge
Write a program or ...
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votes
69
answers
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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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votes
21
answers
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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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votes
6
answers
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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 ...
- 23.3k
25
votes
16
answers
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Prime Wednesdays
Prime Wednesdays
Your task is to count the number of Wednesdays that fall on a prime day of the month in a particular year. For instance, 7-13-16 is a prime ...
- 5,716
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votes
11
answers
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Legalize Reversed Date
Input:
A Date (containing dd, MM and yyyy). A date-object, or three separate integers are ...
- 123k
6
votes
4
answers
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Validating a CPR number
Validating a CPR number
A Danish CPR number (Person Identification Number) is date of birth followed by 4 digits (the last one being a control digit): DDMMYY-XXXX
The final digit validates the CPR ...
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9
votes
16
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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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10
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I hate Mondays!
You should a program in language X, which will only output its source code (i.e function as a quine) when it is not a monday. On monday it should output some string with a levehnstein distance of 4 ...
- 2,646
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votes
13
answers
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Forecast Palindromic Dates
Palindromic dates are dates that appear as palindromes: the string of digits can be read the same way backwards as forwards. For the North American date format (MM/DD/YYYY), the next few palindromic ...
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votes
65
answers
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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.
...
- 15.1k
78
votes
37
answers
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Wait a minute – in less than ten seconds
Task
Using any type of parallelisation, wait multiple periods, for a total sleep time of at least a minute (but less than a minute and a half).
The program/function must terminate within 10 seconds ...
- 29.9k
9
votes
3
answers
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Simplify a Date
This is similar to simplifying fractions, but with Dates!
The input of your program must be of the form mm/dd
For example
...
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votes
11
answers
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What's the Binary Time?
What's the Binary Time?
Everybody knows what the normal time is. It's up there in the top-right (or wherever you put it) of your screen. But a question people rarely seem to ask themselves is this: ...
user53406
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34
answers
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24 and 12 Hour Times
Write a program or function with no input that prints or returns this string of 24-hour and 12-hour times:
...
- 89.3k
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votes
7
answers
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Compute the RFC 2550 timestamp
RFC 2550 is a satirical proposal (published on April 1, 1999) for a space-efficient ASCII representation of timestamps that can support any date (even those prior to the beginning of the universe and ...
user45941
12
votes
3
answers
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420 <s>Blaze</s> Golf It
This is a pretty simple challenge, but (I hope) a fun one.
Task
If right now either the month is 4 and the day is 20, the hour (...
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12
votes
1
answer
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Beat Pure Regular Expressions at Validating ISO 8601 Dates
In ValiDate ISO 8601 by RX, the challenge was to use only standard regular expressions to validate standard date formats and values (the former is a common job for RX, the latter was unusual). The ...
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votes
2
answers
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views
Roman-style date formatting
Today (March 15) is the Ides of March, best known for being the date that Julius Caesar was assassinated.
What's “Ides”? Well, the ancient Romans didn't simply number the days of month from 1 to 31 ...
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votes
37
answers
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Happy Rounded Pi Day
To celebrate Rounded Pi Day, you must take advantage of today's date to make a program that takes in a circle's diameter and outputs its circumference by multiplying the diameter by 3.1416, where 3....
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votes
1
answer
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Graduation Meme Tally [closed]
Now that we're graduating, it's time to tally up the number of times someone suggested that PPCG was graduating, even before the annoucement! (see here)
Your program will receive a list of chat ...
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votes
19
answers
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views
Read an analog clock
You are given the positions of the minute and hour hands of an analog clock as an angle of clockwise rotation from the top (12). So a hand pointing at 9 is at an angle if 270, and a hand pointing ...
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votes
3
answers
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Generate lazy microwave input
Related: Program my microwave oven and Generate lazy values.
My colleague is so lazy that he doesn't even bother to move his finger when programming the microwave oven. (This is actually true!)
Help ...
- 29.9k
3
votes
1
answer
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views
What time is it again? [closed]
The Inspiration
The Challenge
I'm tired of seeing the same old-same old clock in my top-right-hand corner of my screen. It's time for a new clock. While the clock clock sated my lack of interesting ...
- 11.2k
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votes
16
answers
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Is the time linear?
I like patterns in time. My favorite is when the time lines up. For example, all of these line up:
3:45
12:34
23:45
3:21
6:54
This is because each digit in the ...
- 1,377
0
votes
0
answers
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views
Is it a leap year? Use only assignments and arithmetic expressions [duplicate]
Write a program that outputs 1 when the year is a leap year, otherwise 0. You can use any programming language, but use only assignments and arithmetic expressions for the calculation.
The Gregorian ...
2
votes
1
answer
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views
Convert string to time
This challenge is inspired by this other.
The challenge
Write a program or a function in any programming language that given as input a string representing a time in English (see below, for further ...
- 1,007
19
votes
8
answers
783
views
Convert the Time to a String
Problem
One day, you boss walks up to you and tells you he needs to know the time. He still insists after you pointing at the clock directly above your head, and confesses he has a severe case of ...
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votes
3
answers
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Check work periods
Introduction
Here in Germany the ruling on work times is very strict. If you work 6 or more hours a day, you have to take at least a 30 minute break. If you work 9 or more hours, you need to take a ...
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votes
9
answers
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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 ...
- 6,831
17
votes
10
answers
715
views
Next public holiday
Australians love public holidays, and drinking. Yesterday, the 26th January, was Australia day, which is a public holiday. I was glad to not be at work yesterday, and eager to know the next time I get ...
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votes
1
answer
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Calculate the Lunar Phase
Introduction
tl;dr
In this challenge you have to calculate the moon's phase for a given date.
This challenge is inspired by the game psycho social audiovisual experiment "Superbrothers: Sword & ...
- 4,729
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votes
6
answers
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Superstitious Programming
Your challenge is extremely simple. Given a year as input, print all the months in that year that will contain a Friday the 13th according to the Gregorian calendar. Note that even though the ...
- 58.9k
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votes
17
answers
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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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11
votes
16
answers
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Chinese Zodiac of the year
2015 was the year of the goat! In this challenge, you will figure out which animal represents the year. To avoid making this challenge to complex you won't need to calculate Chinese new year.
Because ...
- 28.9k
17
votes
2
answers
953
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Forgotten Realms date calculator
In an effort to level the playing field between languages with built-in date libraries and those without, let's work with a fictional calendar. The Forgotten Realms are a (the?) campaign setting for ...
- 196k
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vote
5
answers
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Parrot User’s Delay [duplicate]
A simple code golf challenge similar to an already existing, but more complex one:
Wait for user to press enter.
Wait for user to press enter again.
Print the elapsed time between the 1. and 2.
Wait ...
- 29.9k
47
votes
9
answers
3k
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Read a date in xkcd notation
In his xkcd about the ISO 8601 standard date format Randall snuck in a rather curious alternative notation:
The large numbers are all the digits that appear in the current date in their usual order, ...
- 196k
26
votes
8
answers
1k
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Convert a date to xkcd notation
In his xkcd about the ISO 8601 standard date format Randall snuck in a rather curious alternative notation:
The large numbers are all the digits that appear in the current date in their usual order, ...
- 196k