Questions tagged [calendar]
A calendar is a system of reckoning time in which the beginning, length and divisions of a year are defined. The term may refer to a software class or library for the manipulation and display of calendar data, or to a list of events with associated dates and times, managed by a human via an application or operating system user interface.
calendar
13,750
questions
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How to change date format (MM/DD/YY) to (YYYY-MM-DD) in date picker
I have following datepicker script:
<script>
$(function(){
$("#to").datepicker();
$("#from").datepicker().bind("change",function(){
var minValue = $(this).val();
...
54
votes
4
answers
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Calendar add() vs roll() when do we use it?
I know add() adds the specified (signed) amount of time to the given time field, based on the calendar's rules.
And roll() adds the specified (signed) single unit of time on the given time field ...
52
votes
10
answers
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How can I select all of the Sundays for a year using Python?
Using Python...
How can I select all of the Sundays (or any day for that matter) in a year?
[ '01/03/2010','01/10/2010','01/17/2010','01/24/2010', ...]
These dates represent the Sundays for 2010. ...
51
votes
4
answers
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Java: How do you convert a UTC timestamp to local time?
I have a timestamp that's in UTC and I want to convert it to local time without using an API call like TimeZone.getTimeZone("PST"). How exactly are you supposed to do this? I've been using the ...
50
votes
19
answers
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Android Days between two dates
I want to compare two dates for my Android application, but I got a really weird issue.
For example:
If I set the back in the past date to 127 days ago:
this.dateEvent = System.currentTimeMillis() -...
50
votes
14
answers
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How do I discover the Quarter of a given Date?
Given a java.util.Date object how do I go about finding what Quarter it's in?
Assuming Q1 = Jan Feb Mar, Q2 = Apr, May, Jun, etc.
50
votes
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answers
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How to get last month/year in java?
How do I find out the last month and its year in Java?
e.g. If today is Oct. 10 2012, the result should be Month = 9 and Year = 2012. If today is Jan. 10 2013, the result should be Month = 12 and Year ...
50
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5
answers
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Converting to and from Hindu calendar
How can I convert unix time to Hindu calendarWikipedia time and the other way round in php, Perl or Python or Java? I know I can convert to Hebrew and Jewish. But Hindu is not an option.
To be ...
48
votes
3
answers
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How to change TIMEZONE for a java.util.Calendar/Date
I would like to change the TIMEZONE value in a Java Calendar instance at runtime.
I tried below. But the output is the same in both instances:
Calendar cSchedStartCal = Calendar.getInstance(...
48
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7
answers
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Design question: How would you design a recurring event system? [closed]
If you were tasked to build an event scheduling system that supported recurring events, how would you do it? How do you handle when an recurring event is removed? How could you see when the future ...
47
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How to check if a date Object equals yesterday?
Right now I am using this code
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(...
47
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7
answers
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Moon / Lunar Phase Algorithm
Does anyone know an algorithm to either calculate the moon phase or age on a given date or find the dates for new/full moons in a given year?
Googling tells me the answer is in some Astronomy book, ...
47
votes
9
answers
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Getting Year, Month and Date in Android
I am trying to get today's Year, Month and Date using following code;
Calendar calendar = Calendar.getInstance();
int thisYear = calendar.get(Calendar.YEAR);
Log.d(TAG, "# thisYear : " + thisYear);
...
45
votes
2
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java.lang.IllegalArgumentException: Bad class: class java.util.GregorianCalendar
I received this exception while using GregorianCalendar
java.lang.IllegalArgumentException: Bad class: class java.util.GregorianCalendar
Who know how to fix,
Please help me.
p/s : I used the ...
44
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17
answers
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NSCalendar first day of week
Does anyone know if there is a way to set the first day of the week on a NSCalendar, or is there a calendar that already has Monday as the first day of the week, instead of Sunday.
I'm currently ...