How to get start and end of day in Javascript

Question

How to get start   00 00 00   and end   23 59 59   of today in timestamp   GMT    Computer use a local time

User · Answer

FYI  merged version of Tvanfosson      it will return actual date    date when you are calling function   export const today       iso        start       gt  new Date new Date   setHours 0  0  0  0   toISOString        now       gt  new Date   toISOString        end       gt  new Date new Date   setHours 23  59  59  999   toISOString          local      start       gt  new Date new Date new Date   setHours 0  0  0  0   toString   split  GMT   0      UTC   toISOString      now       gt  new Date new Date   toString   split  GMT   0      UTC   toISOString      end       gt  new Date new Date new Date   setHours 23  59  59  999   toString   split  GMT   0      UTC   toISOString              how to use  today local now       2018-09-07T01 48 48 000Z  BAKU  04 00 today iso now        2018-09-06T21 49 00 304Z         it is applicable for Instant time type on Java8 which convert your local time automatically depending on your region  if you are planning write global app

User · Answer

Using the momentjs library  this can be achieved with the startOf   and endOf   methods on the moment s current date object  passing the string  day  as arguments   Local GMT   var start   moment   startOf  day       set to 12 00 am today var end   moment   endOf  day       set to 23 59 pm today   For UTC   var start   moment utc   startOf  day     var end   moment utc   endOf  day

User · Answer

I prefer to use date-fns library for date manipulating  It is really great modular and consistent tool  You can get start and end of the day this way    x000D   x000D  var startOfDay   dateFns startOfDay  x000D  var endOfDay   dateFns endOfDay  x000D   x000D  console log  start of day    gt     startOfDay new Date  2015-11-11      x000D  console log  end of day    gt     endOfDay new Date  2015-11-11      x000D   lt script src  https   cdnjs cloudflare com ajax libs date-fns 1 29 0 date fns min js  gt  lt  script gt  x000D   x000D   x000D

User · Answer

In MomentJs We can declare it like       const start   moment   format  YYYY-MM-DD 00 00 01       const end   moment   format  YYYY-MM-DD 23 59 59

User · Answer

var start   new Date    start setHours 0 0 0 0    var end   new Date    end setHours 23 59 59 999    alert  start toUTCString           end toUTCString        If you need to get the UTC time from those  you can use UTC

User · Answer

If you re just interested in timestamps in GMT you can also do this  which can be conveniently adapted for different intervals  hour  1000   60   60  12 hours  1000   60   60   12  etc    const interval   1000   60   60   24     24 hours in milliseconds  let startOfDay   Math floor Date now     interval    interval  let endOfDay   startOfDay   interval - 1     23 59 59 9999

User · Answer

Using the luxon js library  same can be achieved using startOf and endOf methods by passing the  day  as parameter   var DateTime   luxon DateTime  DateTime local   startOf  day   toUTC   toISO      2017-11-16T18 30 00 000Z DateTime local   endOf  day   toUTC   toISO      2017-11-17T18 29 59 999Z DateTime fromISO new Date   toISOString    startOf  day   toUTC   toISO      2017-11-16T18 30 00 000Z      remove  toUTC   if you need only the local time   and you may ask why not moment js  answer is here for that

User · Answer

This is how we can do it in Java 8 style using LocalDate  LocalDate localDateStart   LocalDate now   plusDays 5   Date startDate   Date from localDateStart atStartOfDay ZoneId systemDefault    toInstant      LocalDate localDateEnd   localDateStart plusDays 1   Date endDate   Date from localDateEnd atStartOfDay ZoneId systemDefault    toInstant

User · Answer

It might be a little tricky  but you can make use of Intl DateTimeFormat  The snippet bellow can help you convert any date with any timezone to its begining end time   x000D   x000D  const beginingOfDay    options         gt      const   date   new Date    timeZone     options    const parts   Intl DateTimeFormat  en-US         timeZone      hourCycle   h23       hour   numeric       minute   numeric       second   numeric        formatToParts date     const hour   parseInt parts find  i    gt  i type      hour   value     const minute   parseInt parts find  i    gt  i type      minute   value     const second   parseInt parts find  i    gt  i type      second   value     return new Date      1000         Math floor           date - hour   3600000 - minute   60000 - second   1000    1000                  const endOfDay       args    gt    new Date beginingOfDay    args  getTime     86399999    const beginingOfYear        gt       console log beginingOfDay   timeZone   GMT       console log endOfDay   timeZone   GMT       console log beginingOfDay   timeZone   Asia Tokyo       console log endOfDay   timeZone   Asia Tokyo       x000D   x000D   x000D

[javascript] How to get start and end of day in Javascript?

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