showWeek goes to 53 for subsequent year

[dmfontz]

the showWeek function goes to week 53 when flipping from current year into January of subsequent year.

See: ​http://jsbin.com/omaqe/edit

Open the datepicker and click months to get to Jan of next year.

[amarlot]

Hi,

I found this bug too in the same situation.

Any Workaround for this bug ? Thanks

[kbwood]

This is correct. The week of the year is calculated based on the first date shown in each week - in this case each Sunday. The ISO 8601 definition of a week states that a week starts on a Monday and that the first week of the year contains the first Thursday of the year. Thus, for 2010, the first week of the year is Mon Jan 4 through Sun Jan 10. So, Sun Jan 3 belongs to week 53 of the previous year and since this is the first day shown in the week, 53 is the number of the week shown.

To correctly display the week number you should always start the week on a Monday: datepicker({firstDay: 1}). Alternately, you can define your own week calculation function and use that instead: datepicker({calculateWeek: myweek}).

[aeischeid]

My opinion is that this is a bug. At least it is very confusing to US users. Perhaps a solution would be to determine the week number to display based not on the first day of the week or the first column in the calendar, but rather base it on the Thursday column.

basically this would just require passing a different date into the iso8601Week function or adding 3 or 4 to the date that gets passed in... shouldn't be hard anyway.