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Calculate business days

I need a method for adding "business days" in PHP. For example, Friday 12/5 + 3 business days = Wednesday 12/10.

At a minimum I need the code to understand weekends, but ideally it should account for US federal holidays as well. I'm sure I could come up with a solution by brute force if necessary, but I'm hoping there's a more elegant approach out there. Anyone?

Thanks.

Convert String to Calendar Object in Java

I am new to Java, usually work with PHP.

I am trying to convert this string:

Mon Mar 14 16:02:37 GMT 2011

Into a Calendar Object so that I can easily pull the Year and Month like this:

String yearAndMonth = cal.get(Calendar.YEAR)+cal.get(Calendar.MONTH);

Would it be a bad idea to parse it manually? Using a substring method?

Any advice would help thanks!

How do I localize the jQuery UI Datepicker?

I really need a localized dropdown calendar. An English calendar doesn't exactly communicate excellence on a Norwegian website ;-)

I have experimented with the jQuery DatePicker, their website says it can be localized, however that doesn't seem to work.

I am using ASPNET.MVC, and I really want to stick to one javascript library. In this case jQuery.

The ajax toolkit calendar would be acceptable, if only it too would display Norwegian names.

Update: Awesome! I see I am missing the language files, a not so minor detail :-)

Calendar returns wrong month

Calendar rightNow = Calendar.getInstance();
String month = String.valueOf(rightNow.get(Calendar.MONTH));

After the execution of the above snippet, month gets a value of 10 instead of 11. How come?

Joda Time: First day of week?

How do you get the first day of week given a Locale using Joda-Time?

Point: Most countries use the international standard Monday as first day of week (!). A bunch others use Sunday (notably USA). Others apparently Saturday. Some apparently Wednesday?!

Wikipedia "Seven-day week"#Week_number

Date object to Calendar [Java]

I have a class Movie in it i have a start Date, a duration and a stop Date. Start and stop Date are Date Objects (private Date startDate ...) (It's an assignment so i cant change that) now i want to automatically calculate the stopDate by adding the duration (in min) to the startDate.

By my knowledge working with the time manipulating functions of Date is deprecated hence bad practice but on the other side i see no way to convert the Date object to a calendar object in order to manipulate the time and reconvert it to a Date object. Is there a way? And if there is what would be best practice

Thanks in advance

Samuel

Java Date vs Calendar

Could someone please advise the current "best practice" around Date and Calendar types.

When writing new code, is it best to always favour Calendar over Date, or are there circumstances where Date is the more appropriate datatype?

Why is January month 0 in Java Calendar?

In java.util.Calendar, January is defined as month 0, not month 1. Is there any specific reason to that ?

I have seen many people getting confused about that...

What's the best way to model recurring events in a calendar application?

I'm building a group calendar application that needs to support recurring events, but all the solutions I've come up with to handle these events seem like a hack. I can limit how far ahead one can look, and then generate all the events at once. Or I can store the events as repeating and dynamically display them when one looks ahead on the calendar, but I'll have to convert them to a normal event if someone wants to change the details on a particular instance of the event.

I'm sure there's a better way to do this, but I haven't found it yet. What's the best way to model recurring events, where you can change details of or delete particular event instances?

(I'm using Ruby, but please don't let that constrain your answer. If there's a Ruby-specific library or something, though, that's good to know.)

Programmatically add custom event in the iPhone Calendar

Is there any way to add iCal event to the iPhone Calendar from the custom App?

System.currentTimeMillis() vs. new Date() vs. Calendar.getInstance().getTime()

In Java, what are the performance and resource implications of using

System.currentTimeMillis()

vs.

new Date()

vs.

Calendar.getInstance().getTime()

As I understand it, System.currentTimeMillis() is the most efficient. However, in most applications, that long value would need to be converted to a Date or some similar object to do anything meaningful to humans.

Calendar Recurring/Repeating Events - Best Storage Method

I am building a custom events system, and if you have a repeating event that looks like this:

Event A repeats every 4 days starting on March 3, 2011

or

Event B repeats every 2 weeks on Tuesday starting on March 1, 2011

How can I store that in a Database in a way that would make it simple to lookup. I don't want performance issues if there are a large number of events, and I have to go through each and every one when rendering the calendar.

How to add calendar events in Android?

I'm just getting up to speed on Android, and today in a project meeting someone said that Android has no native calendar app so users just use whatever calendar app they like.

Is this true, and if so how do I programmatically add an event to the user's calendar? Is there a common API they all share?

For what it's worth, we're probably targeting Android 2.x.

How to subtract X days from a date using Java calendar?

Anyone know a simple way using Java calendar to subtract X days from a date?

I have not been able to find any function which allows me to directly subtract X days from a date in Java. Can someone point me to the right direction?

Adding a Resource View/Gannt chart to jQuery Fullcalendar

I am using jQuery Fullcalendar and if you're not using it I suggest you do too because it is absolutely fantastic at what it does!

However to be really useful to me and my project (and many others) I honestly believe it needs a resource/gannt view.

Not a problem one would think... until you look under the hood of jQuery FullCalendar and see that the way it generates it's views is not for javascript developer wannabes... ie me.

Having realised this is out of my league I had to go searching elsewhere looking for any calendar/scheduler that will provide a resource view.

Here are three proprietary calendars that promise this feature.

1. http://java.daypilot.org/
2. http://www.dhtmlx.com/docs/products/dhtmlxScheduler/index.shtml
3. http://web2cal.com/ajaxeventscalendar/calendar-demo/912-premium-demo/157-scheduler-view

Unfortunately both daypilot and dhtmlxscheduler lack the clean and clear interface that FullCalendar achieves so well and web2cal just looks and feels unfinished and is still in Beta.

Alternatively I was wondering if anyone has any ideas on how I could integrate a jQuery Gannt chart with jquery fullcalendar.

I have found a few projects that look promising

• http://www.maro-z.com/examples/jquery.gantt/
• http://code.google.com/p/jquery-gantt/
• http://github.com/thegrubbsian/jquery.ganttView

I have looked into how fullcalendar generates its views and so far have not had any success in extending this to provide a container for one of these gannt charts to 'sit within' fullcalendar and be triggered by its buttons.

This seems to be one of the more popular feature requests with many people asking for it on the official issue tracker

http://code.google.com/p/fullcalendar/issues/detail?id=150&colspec=ID%20Type%20Status%20Milestone%20Summary%20Stars

So I am left at a cross roads. I could pay for a half baked proprietary solution that has minimal to no community support or I can try and find a way of getting a resource view inside of jquery Fullcalendar by asking the people who really know jQuery.

I would happily donate the funds saved from using a proprietary solution to the developer of Fullcalendar.

The developer of FullCalendar seems to have a lot on his plate and I would like to again thank him for this truly amazing calendar.

I hope someone can share a solution with us!

Tim