calculate whether weekend weekday or holiday [duplicate] - javascript

This question already has answers here:
Determine if a date is a Saturday or a Sunday using JavaScript
(6 answers)
Checking if date belongs to array of dates
(3 answers)
How to determine if date is weekend in JavaScript
(11 answers)
Moment JS Excluding Holidays
(2 answers)
Closed 3 years ago.
I have a start date and end date from my request need to find whether the given day is weekday or weekend or holiday(from list of holidays in db)
I tried using moment.js

moment.js is just a library to manage dates, what you need is an algorithm to find if one of the dates is weekend or weekday.
So what you can do is get the day number from the date (0-6) where 0 is sunday.
Let's say
var date = moment("2015-07-02");
var dow = date.day();
And about holidays or not or not, that's simple also, you need to get an array with all the dates in the same format that you are using with moment.js and iterate through the array to do it something like:
var holidays = ["2019-07-02", "2019-07-04"]
let isHoliday = holidays.find(x => x === "2015-07-02")
You need to do some work after all you need is here.

To determine if a given date is a weekend is actually pretty simple and already has an answer here.
To determine if a given date is holiday is bit more complex, you can not achieve it with native JavaScript, you will need the help of external package.
I recommend you to use moment-holiday, it has a simplest API:
moment('2017-12-25').isHoliday();
//Christmas Day
moment('2005-03-15').isHoliday();
//false
moment('2009-10-31').isHoliday('Halloween');
//true
moment('2017-12-31').isHoliday();
//New Year's Eve
moment('2017-12-31').isHoliday(null, true);
//false
Or you can use date-holidays.

Related

Getting the date of the nth day after a given date [duplicate]

This question already has answers here:
Incrementing a date in JavaScript
(19 answers)
How to add days to Date?
(56 answers)
Closed 2 years ago.
I am looking to find the date for, say, the 100th day after any given day. Is there a way to do that via javascript?
I was hoping it could be as simple as below, but it isn't quite that simple.
var givenDay = new Date(01/01/2020);
var hundredthDay = new Date(givenDay + 100);
console.log(hundredthDay)
You can try using .setDate() and .getDate() combination.
The setDate() method sets the day of the Date object relative to the beginning of the currently set month.
The getDate() method returns the day of the month for the specified date according to local time.
Adding the required days to .getDate() as the following:
const givenDay = new Date('01/01/2020');
console.log(givenDay);
const result = new Date(givenDay.setDate(givenDay.getDate() + 1 + 100));
console.log(result);
I hope this helps!

exclude holidays and weekends when adding dates in javascript [duplicate]

This question already has answers here:
Set date to 7 working days from today (excluding weekends and public holidays)
(3 answers)
Closed 4 years ago.
I would like to add 10 days to a date excluding holidays and weekends. Here is the code i am using but i am unable to figure out how to take out the holidays and weekends. Thanks for any help!!
var someDate = item.INITIAL_REQUEST;
var numberOfDaysToAdd = 10;
someDate.setDate(someDate.getDate() + numberOfDaysToAdd);
item.FINAL_REQUEST = someDate;
There isn't a built-in command to do this.
Basically you have to add one date at a time, and test each one for whether it's a holiday or weekend. Weekends are easy:
function amIAWeekend(someDate){
return someDate.getDay() == 6 || someDate.getDay() == 0;
}
Testing for a holiday is much harder. The simplest thing to do might be to have a list of holidays in some sort of JSON format, and then for each date run through the list to see if it matches.
Hope this helps get you started!

How to get correct month using getMonth in javascript [duplicate]

This question already has answers here:
Convert dd-mm-yyyy string to date
(15 answers)
Why does Date.parse give incorrect results?
(11 answers)
Closed 4 years ago.
I have this
let d = new Date("03-08-2018"); //dd-mm-yyyy
console.log(d.getMonth()); // returns 02, I want 07
I have my date in dd-mm-yy. The getMonth() thinks I'm using mm-dd-yy.
How do I get correct month and date.
Your date format is not standard, and I strongly recommend not to use such code on a client web code, because how it behaves would be client-dependent.
EDIT (thx RobG) : Don't use the builtin parser new Date(), this will get you into trouble depending on the client timezone, even if you use a proper format where the month seems to be correctly recognized.
You'll have to create some function to parse the string yourself and create a Date object with year, month and day manually set, that would be the safe way.
Example of manual parsing :
let regex = /^(\d{2})-(\d{2})-(\d{4})$/; // each parsing group is day-month-year
let date = '03-05-2018';
let match = regex.exec(date);
let month = +match[2] - 1; // starting at 0, remove -1 if you want 1-based month number
console.log(month); // returns 4 in this example '03-05-2018'
(of course you should also put some guards if the string is not matching the correct format)
JS Date give the month starts with 0. So Try this below for getting month from date
let d = new Date("03-05-2018"); //dd-mm-yyyy
console.log(d.getMonth()+1);
if you want 4, then you should add +2 ( but i am not sure why you want 4)
let d = new Date("03-05-2018"); //dd-mm-yyyy
console.log(d.getMonth()+2);

Javascript Determine 10 days before specific date [duplicate]

This question already has answers here:
How to add days to Date?
(56 answers)
Closed 4 years ago.
So I am currently fetching some records from my database, and one of the records is a 'last edited' which is a date. However, I just want to display this 10 days before it has been exactly one year since the specific date. How would I approach this? I know how to deal with arrays and the fetching itself, but I'm not sure how I would deal with the date?
This is what I've done so far:
var startDate = fetchedDate;
var validDate = new Date(startDate);
var fullYear = validDate.getFullYear();
validDate.setFullYear(fullYear + 1);
And then I need to create a new date to compare it, I suppose? But how? I also want to know how many days it is until it has been one year.
If you wanna make it with pure javascript you can
var startDate = fetchedDate;
var validDate = new Date(startDate);
validDate.setYear(validDate.getFullYear() - 1);
validDate.setDate(validDate.getDate() - 10);
But I also will recommend you to use moment.js, is a very good javascript library to handle dates, otherwise sometimes is like trying to reinvent the wheel.

AngularJS how to add days / months / years to a date [duplicate]

This question already has answers here:
How to add number of days to today's date? [duplicate]
(16 answers)
Closed 8 years ago.
We are using AngularJS to set filters.
Basically we have a start date and end date and frequency. When the frequency is set to week, we simply want to add 1 week to the start date, when the frequency is set to daily, we want to add 1 day to the start date.
Basically something like :-
var date = new date();
date.addDays(2);
date.addMonths(2);
date.addYears(2);
I would consider using moment.js for all of your JS date related needs then you can do:
var date = moment();
date.add(2, 'days');
date.add(2, 'months');
date.add(2, 'years');
// or all of the above with:
date.add({years: 2, months: 2, days: 2});
And if you need a regular JS date object at the end, check out this post

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