Javascript Time and Date Getting the current minute hour day week month year of a given millisecond time

Question

I m still wrapping my head around this library  but I m out of time so I ll just skip to the spoiler section and ask   With a given  arbitrary millisecond time value  like the kind you d gave from  getTime     how do I get the current minute  hour  day  week of the month  month  week of the year  and year of that specific millisecond of time   Additionally  how do I retrieve the number of days of a given month   Anything I should know about regarding leap years and other stuff

User · Answer

Additionally  how do I retrieve the number of days of a given month    Aside from calculating it yourself  and consequently having to get leap years right   you can use a Date calculation to do it   var y  2010  m  11                December 2010 - trap  months are 0-based in JS  var next  Date UTC y  m 1         timestamp of beginning of following month var end  new Date next-1          date for last second of this month var lastday  end getUTCDate       31   In general for timestamp date calculations I d recommend using the UTC-based methods of Date  like getUTCSeconds instead of getSeconds    and Date UTC to get a timestamp from a UTC date  rather than new Date y  m   so you don t have to worry about the possibility of weird time discontinuities where timezone rules change

User · Answer

Here is another method to get date  new Date   getDate               Get the day as a number  1-31  new Date   getDay                Get the weekday as a number  0-6  new Date   getFullYear           Get the four digit year  yyyy  new Date   getHours              Get the hour  0-23  new Date   getMilliseconds       Get the milliseconds  0-999  new Date   getMinutes            Get the minutes  0-59  new Date   getMonth              Get the month  0-11  new Date   getSeconds            Get the seconds  0-59  new Date   getTime               Get the time  milliseconds since January 1  1970

User · Answer

The variable names should be descriptive   var date   new Date  date setTime result from Date getTime    var seconds   date getSeconds    var minutes   date getMinutes    var hour   date getHours     var year   date getFullYear    var month   date getMonth       beware  January   0  February   1  etc  var day   date getDate     var dayOfWeek   date getDay       Sunday   0  Monday   1  etc  var milliSeconds   date getMilliseconds      The days of a given month do not change  In a leap year  February has 29 days  Inspired by http   www javascriptkata com 2007 05 24 how-to-know-if-its-a-leap-year   thanks Peter Bailey    Continued from the previous code   var days in months    31  28  31  30  31  30  31  31  30  31  30  31      for leap years  February has 29 days  Check whether    February  the 29th exists for the given year if   new Date year  1  29   getDate      29   days in month 1    29    There is no straightforward way to get the week of a year  For the answer on that question  see Is there a way in javascript to create a date object using year  amp  ISO week number

User · Answer

Regarding number of days in month just use static switch command and check if  year   4    0  in which case February will have 29 days   Minute  hour  day etc   var someMillisecondValue   511111222127  var date   new Date someMillisecondValue   var minute   date getMinutes    var hour   date getHours    var day   date getDate    var month   date getMonth    var year   date getFullYear    alert  minute  hour  day  month  year  join   n

[javascript] Javascript, Time and Date: Getting the current minute, hour, day, week, month, year of a given millisecond time

Examples related to javascript

Examples related to datetime