How to Know the Current Quarter with Date

How to know the current quarter with date?

The dates corresponding to the start and end of a fiscal quarter vary by country, as well by the nature of the entity doing the fiscal reporting (corporate/personal/government/other...); some companies also have alternate schedules. As such, there is no standard API for this. You will have to get the current month and date and compare it to the appropriate quarter start/end dates for the country and entity of interest. You can find the dates for some countries in wikipedia.

How to find quarter first date and last date from current date using laravel

$date = CarbonImmutable::now();
$startCurrent = $date->startOfQuarter();
$startPrevious = $startCurrent->subQuarter();

echo $startPrevious . "\n";
echo $startPrevious->endOfQuarter() . "\n";
echo $startCurrent . "\n";
echo $startCurrent->endOfQuarter() . "\n";

Is there a function to determine which quarter of the year a date is in?

Given an instance x of datetime.date, (x.month-1)//3 will give you the quarter (0 for first quarter, 1 for second quarter, etc -- add 1 if you need to count from 1 instead;-).

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Originally two answers, multiply upvoted and even originally accepted (both currently deleted), were buggy -- not doing the -1 before the division, and dividing by 4 instead of 3. Since .month goes 1 to 12, it's easy to check for yourself what formula is right:

for m in range(1, 13):
  print m//4 + 1,
print

gives 1 1 1 2 2 2 2 3 3 3 3 4 -- two four-month quarters and a single-month one (eep).

for m in range(1, 13):
  print (m-1)//3 + 1,
print

gives 1 1 1 2 2 2 3 3 3 4 4 4 -- now doesn't this look vastly preferable to you?-)

This proves that the question is well warranted, I think;-).

I don't think the datetime module should necessarily have every possible useful calendric function, but I do know I maintain a (well-tested;-) datetools module for the use of my (and others') projects at work, which has many little functions to perform all of these calendric computations -- some are complex, some simple, but there's no reason to do the work over and over (even simple work) or risk bugs in such computations;-).

Get current quarter in year with javascript

Given that you haven't provided any criteria for how to determine what quarter "*we are currently in", an algorithm can be suggested that you must then adapt to whatever criteria you need. e.g.

// For the US Government fiscal year
// Oct-Dec = 1
// Jan-Mar = 2
// Apr-Jun = 3
// Jul-Sep = 4
function getQuarter(d) {
  d = d || new Date();
  var m = Math.floor(d.getMonth()/3) + 2;
  return m > 4? m - 4 : m;
}

As a runnable snippet and including the year:

function getQuarter(d) {

  d = d || new Date();

  var m = Math.floor(d.getMonth() / 3) + 2;

  m -= m > 4 ? 4 : 0;

  var y = d.getFullYear() + (m == 1? 1 : 0);

  return [y,m];

}

console.log(`The current US fiscal quarter is ${getQuarter().join('Q')}`);

console.log(`1 July 2018 is ${getQuarter(new Date(2018,6,1)).join('Q')}`);

Calculate quarter for dates given an example end date and quarter number

Assuming that you have two input variables:

declare @quarter_end date = '2021-01-31';
declare @current_quarter int = 4;

You can calculate the first month of financial year:

declare @first_month_of_fy int = (month(@quarter_end) - @current_quarter * 3 + 12) % 12 + 1;
-- 2 i.e. February

And use that value to calculate the quarter and year for any date using some math:

select *
from (values
    ('2020-12-15'),
    ('2021-01-15'),
    ('2021-12-15'),
    ('2022-01-15')
) as t(testdate)
cross apply (select
    (month(testdate) - @first_month_of_fy + 12) % 12 + 1
) as ca1(month_of_fy)
cross apply (select
    (month_of_fy - 1) / 3 + 1,
    year(dateadd(month, 12 - month_of_fy, dateadd(day, - day(testdate) + 1, testdate)))
) as ca2(fy_quarter, fy_year)

DB<>Fiddle

get startdate and enddate for current quarter php

check this for this quarter.

 case 'this_quarter':

          $current_month = date('m');
          $current_year = date('Y');
          if($current_month>=1 && $current_month<=3)
          {
            $start_date = strtotime('1-January-'.$current_year);  // timestamp or 1-Januray 12:00:00 AM
            $end_date = strtotime('1-April-'.$current_year);  // timestamp or 1-April 12:00:00 AM means end of 31 March
          }
          else  if($current_month>=4 && $current_month<=6)
          {
            $start_date = strtotime('1-April-'.$current_year);  // timestamp or 1-April 12:00:00 AM
            $end_date = strtotime('1-July-'.$current_year);  // timestamp or 1-July 12:00:00 AM means end of 30 June
          }
          else  if($current_month>=7 && $current_month<=9)
          {
            $start_date = strtotime('1-July-'.$current_year);  // timestamp or 1-July 12:00:00 AM
            $end_date = strtotime('1-October-'.$current_year);  // timestamp or 1-October 12:00:00 AM means end of 30 September
          }
          else  if($current_month>=10 && $current_month<=12)
          {
            $start_date = strtotime('1-October-'.$current_year);  // timestamp or 1-October 12:00:00 AM
            $end_date = strtotime('1-January-'.($current_year+1));  // timestamp or 1-January Next year 12:00:00 AM means end of 31 December this year
          }

        break;

Update : 2
and for last quarter

case 'last_quarter':

          $current_month = date('m');
          $current_year = date('Y');

          if($current_month>=1 && $current_month<=3)
          {
            $start_date = strtotime('1-October-'.($current_year-1));  // timestamp or 1-October Last Year 12:00:00 AM
            $end_date = strtotime('1-January-'.$current_year);  // // timestamp or 1-January  12:00:00 AM means end of 31 December Last year
          } 
          else if($current_month>=4 && $current_month<=6)
          {
            $start_date = strtotime('1-January-'.$current_year);  // timestamp or 1-Januray 12:00:00 AM
            $end_date = strtotime('1-April-'.$current_year);  // timestamp or 1-April 12:00:00 AM means end of 31 March
          }
          else  if($current_month>=7 && $current_month<=9)
          {
            $start_date = strtotime('1-April-'.$current_year);  // timestamp or 1-April 12:00:00 AM
            $end_date = strtotime('1-July-'.$current_year);  // timestamp or 1-July 12:00:00 AM means end of 30 June
          }
          else  if($current_month>=10 && $current_month<=12)
          {
            $start_date = strtotime('1-July-'.$current_year);  // timestamp or 1-July 12:00:00 AM
            $end_date = strtotime('1-October-'.$current_year);  // timestamp or 1-October 12:00:00 AM means end of 30 September
          }

        break;

How to get the first date and last date of current quarter in java.util.Date

Here is solution in Java 7 or older (otherwise, I suggest to check other answers):

private static Date getFirstDayOfQuarter(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.set(Calendar.DAY_OF_MONTH, 1);
    cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)/3 * 3);
    return cal.getTime();
}

private static Date getLastDayOfQuarter(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.set(Calendar.DAY_OF_MONTH, 1);
    cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)/3 * 3 + 2);
    cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
    return cal.getTime();
}

Note 1: Months in java.util.Calendar are represented as integers starting from 0 (Jan) through 11 (Dec)

Note 2: division of integers in Java results in floor value (another integer value). So 2/3 = 0, 4/3 = 1 and so forth.
So, cal.get(Calendar.MONTH)/3 * 3 calculates zero-based index of quarter: 0(Q1), 1(Q2), 2(Q3), 3(Q4).

Example: Feb in Calendar is 1. So, 1 / 3 * 3 = 0.

If Feb date is supplied, then start of the quarter is 1st of Jan (because we got 0) and the end of quarter is last day of month 0 + 2 = 2 (Mar)

Easy way to get day number of current quarter?

I wrote a class with the following methods. Enjoy.

public static function getQuarterByMonth($monthNumber) {
  return floor(($monthNumber - 1) / 3) + 1;
}

public static function getQuarterDay($monthNumber, $dayNumber, $yearNumber) {
  $quarterDayNumber = 0;
  $dayCountByMonth = array();

  $startMonthNumber = ((self::getQuarterByMonth($monthNumber) - 1) * 3) + 1;

  // Calculate the number of days in each month.
  for ($i=1; $i<=12; $i++) {
    $dayCountByMonth[$i] = date("t", strtotime($yearNumber . "-" . $i . "-01"));
  }

  for ($i=$startMonthNumber; $i<=$monthNumber-1; $i++) {
    $quarterDayNumber += $dayCountByMonth[$i];
  }

  $quarterDayNumber += $dayNumber;

  return $quarterDayNumber;
}

public static function getCurrentQuarterDay() {
  return self::getQuarterDay(date('n'), date('j'), date('Y'));
}

How do I discover the quarter of a given date

You can simply write an extension method to DateTime

public static int GetQuarter(this DateTime date)
{
    if (date.Month >= 4 && date.Month <= 6)
        return 1;
    else if (date.Month >= 7 && date.Month <= 9)
        return 2;
    else if (date.Month >= 10 && date.Month <= 12)
        return 3;
    else 
        return 4;
}

and use it as

DateTime dt = DateTime.Now;
dt.GetQuarter();

How do I discover the Quarter of a given Date?

Since Java 8, the quarter is accessible as a field using classes in the java.time package.

import java.time.LocalDate;
import java.time.temporal.IsoFields;

LocalDate myLocal = LocalDate.now();
quarter = myLocal.get(IsoFields.QUARTER_OF_YEAR);

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In older versions of Java, you could use:

import java.util.Date;

Date myDate = new Date();
int quarter = (myDate.getMonth() / 3) + 1;

Be warned, though that getMonth was deprecated early on:

As of JDK version 1.1, replaced by Calendar.get(Calendar.MONTH).

Instead you could use a Calendar object like this:

import java.util.Calendar;
import java.util.GregorianCalendar;

Calendar myCal = new GregorianCalendar();
int quarter = (myCal.get(Calendar.MONTH) / 3) + 1;

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