Current Week Start and End Date

How to get first and last day of the current week in JavaScript

var curr = new Date; // get current date
var first = curr.getDate() - curr.getDay(); // First day is the day of the month - the day of the week
var last = first + 6; // last day is the first day + 6

var firstday = new Date(curr.setDate(first)).toUTCString();
var lastday = new Date(curr.setDate(last)).toUTCString();

firstday
"Sun, 06 Mar 2011 12:25:40 GMT"
lastday
"Sat, 12 Mar 2011 12:25:40 GMT"

This works for firstday = sunday of this week and last day = saturday for this week. Extending it to run Monday to sunday is trivial.

Making it work with first and last days in different months is left as an exercise for the user

Current Week Start and End Date

I solve the problem thanks for Support

Code :- it give the current week start and end date.

 NSDate *today = [NSDate date];
 NSLog(@"Today date is %@",today);
 dateFormat = [[NSDateFormatter alloc] init];
 [dateFormat setDateFormat:@"yyyy-MM-dd"];// you can use your format.

 //Week Start Date 

 NSCalendar *gregorian = [[NSCalendar alloc]        initWithCalendarIdentifier:NSGregorianCalendar];

NSDateComponents *components = [gregorian components:NSWeekdayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:today];

int dayofweek = [[[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:today] weekday];// this will give you current day of week

[components setDay:([components day] - ((dayofweek) - 2))];// for beginning of the week.

NSDate *beginningOfWeek = [gregorian dateFromComponents:components];
NSDateFormatter *dateFormat_first = [[NSDateFormatter alloc] init];
[dateFormat_first setDateFormat:@"yyyy-MM-dd"];
dateString2Prev = [dateFormat stringFromDate:beginningOfWeek];

weekstartPrev = [[dateFormat_first dateFromString:dateString2Prev] retain];

NSLog(@"%@",weekstartPrev);


//Week End Date

 NSCalendar *gregorianEnd = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

 NSDateComponents *componentsEnd = [gregorianEnd components:NSWeekdayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:today];

 int Enddayofweek = [[[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:today] weekday];// this will give you current day of week

 [componentsEnd setDay:([componentsEnd day]+(7-Enddayofweek)+1)];// for end day of the week

 NSDate *EndOfWeek = [gregorianEnd dateFromComponents:componentsEnd];
 NSDateFormatter *dateFormat_End = [[NSDateFormatter alloc] init];
 [dateFormat_End setDateFormat:@"yyyy-MM-dd"];
 dateEndPrev = [dateFormat stringFromDate:EndOfWeek];

 weekEndPrev = [[dateFormat_End dateFromString:dateEndPrev] retain];
  NSLog(@"%@",weekEndPrev);

How to get current week start date ( Monday ) and End Date ( Sunday) in R

You can use lubridate's floor_date and ceiling_date with unit as "week". By default week starts on a Sunday in lubridate so to get start date as Monday we need to add 1 in floor_date.

library(lubridate)
todays_date <- as.Date('2020-07-18')
floor_date(todays_date, 'week') + 1
#[1] "2020-07-13"

ceiling_date(todays_date, 'week')
#[1] "2020-07-19"

Get current week start and end date in Java - (MONDAY TO SUNDAY)

Updated answer using Java 8

Using Java 8 and keeping the same principle as before (the first day of the week depends on your Locale), you should consider using the following:

Obtain the first and last DayOfWeek for a specific Locale

final DayOfWeek firstDayOfWeek = WeekFields.of(locale).getFirstDayOfWeek();
final DayOfWeek lastDayOfWeek = DayOfWeek.of(((firstDayOfWeek.getValue() + 5) % DayOfWeek.values().length) + 1);

Query for this week's first and last day

LocalDate.now(/* tz */).with(TemporalAdjusters.previousOrSame(firstDayOfWeek)); // first day
LocalDate.now(/* tz */).with(TemporalAdjusters.nextOrSame(lastDayOfWeek));      // last day

Demonstration

Consider the following class:

private static class ThisLocalizedWeek {

    // Try and always specify the time zone you're working with
    private final static ZoneId TZ = ZoneId.of("Pacific/Auckland");

    private final Locale locale;
    private final DayOfWeek firstDayOfWeek;
    private final DayOfWeek lastDayOfWeek;

    public ThisLocalizedWeek(final Locale locale) {
        this.locale = locale;
        this.firstDayOfWeek = WeekFields.of(locale).getFirstDayOfWeek();
        this.lastDayOfWeek = DayOfWeek.of(((this.firstDayOfWeek.getValue() + 5) % DayOfWeek.values().length) + 1);
    }

    public LocalDate getFirstDay() {
        return LocalDate.now(TZ).with(TemporalAdjusters.previousOrSame(this.firstDayOfWeek));
    }

    public LocalDate getLastDay() {
        return LocalDate.now(TZ).with(TemporalAdjusters.nextOrSame(this.lastDayOfWeek));
    }

    @Override
    public String toString() {
        return String.format(   "The %s week starts on %s and ends on %s",
                                this.locale.getDisplayName(),
                                this.firstDayOfWeek,
                                this.lastDayOfWeek);
    }
}

We can demonstrate its usage as follows:

final ThisLocalizedWeek usWeek = new ThisLocalizedWeek(Locale.US);
System.out.println(usWeek);
// The English (United States) week starts on SUNDAY and ends on SATURDAY
System.out.println(usWeek.getFirstDay()); // 2018-01-14
System.out.println(usWeek.getLastDay());  // 2018-01-20

final ThisLocalizedWeek frenchWeek = new ThisLocalizedWeek(Locale.FRANCE);
System.out.println(frenchWeek);
// The French (France) week starts on MONDAY and ends on SUNDAY
System.out.println(frenchWeek.getFirstDay()); // 2018-01-15
System.out.println(frenchWeek.getLastDay());  // 2018-01-21

Original Java 7 answer (outdated)

Simply use:

c.setFirstDayOfWeek(Calendar.MONDAY);

Explanation:

Right now, your first day of week is set on Calendar.SUNDAY. This is a setting that depends on your Locale.

Thus, a better alternative would be to initialise your Calendar specifying the Locale you're interested in.

For example:

Calendar c = GregorianCalendar.getInstance(Locale.US);

... would give you your current output, while:

Calendar c = GregorianCalendar.getInstance(Locale.FRANCE);

... would give you your expected output.

Get current week start/end date with DST

I am aware that there is more than one way to skin a cat, but in this case I was interested in how to fix my current code and more importantly to find out what's wrong with it.

Thank you all for your suggestions, especially to @misorude for pointing out the obvious flaw in my initial code, whereas "not every day has 86400 seconds", which is especially true during DST.

So here's the updated working code using relative "days" instead of fixed seconds amount:

$monday = strtotime('next Monday -1 week');
$monday = date('w', $monday)==date('w') ? strtotime(date("Y-m-d",$monday)." +7 days") : $monday;
$sunday = strtotime(date("Y-m-d",$monday)." +6 days");
echo "This week start/end date:<br>";
echo $this_week_sd = date("Y-m-d",$monday)."<br>";
echo $this_week_ed = date("Y-m-d",$sunday)."<br>";

//output:
This week start/end date:
2018-10-29
2018-11-04

Once again, thank you all for your inputs. Much appreciated!

Get the week start date and week end date from week number

You can find the day of week and do a date add on days to get the start and end dates..

DATEADD(dd, -(DATEPART(dw, WeddingDate)-1), WeddingDate) [WeekStart]

DATEADD(dd, 7-(DATEPART(dw, WeddingDate)), WeddingDate) [WeekEnd]

You probably also want to look at stripping off the time from the date as well though.

get the start and end timestamp of the current week in python

You can use datetime.replace():

from datetime import date, datetime, timedelta
today = datetime.now() # or .today()
start = (today - timedelta(days=today.weekday())).replace(hour=0, minute=0, second=0, microsecond=0)
end = (start + timedelta(days=4)).replace(hour=23, minute=59, second=0, microsecond=0)
print("Today: " + str(today))
print("Start: " + str(start))
print("End: " + str(end))

output

Today: 2021-07-08 22:56:19.277242
Start: 2021-07-05 00:00:00
End: 2021-07-09 23:59:00

How do I get the start date and end date of the current week?

Dim dayOfWeek = Cint(DateTime.Today.DayOfWeek)
Dim startOfWeek = DateTime.Today.AddDays(-1 * dayOfWeek)
Dim endOfWeek = DateTime.Today.AddDays(7 - dayOfWeek).AddSeconds(-1)
Console.WriteLine(startOfWeek)
Console.WriteLine(endOfWeek)

Using today's date (2016-06-19) results in

2016-06-19 12:00:00 AM
2016-06-25 11:59:59 PM

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