I am coding little calendar program in c.
I have issue to get first day of week in current locale, i need it to format calendar. For example Sunday - is first day of week in US, but in Europe first day of week is Monday. How can i get this information for current locale? Thank you.
You can create a config file containing a map of locale and first day of the week. Read this config file and create a look up table at the beginning of the program. Refer to this table everytime you are trying to get the first day of the week for a particular locale.
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I have an recurring event on the 7th of each month but am struggling to find an RRule that I can put into a text editor and import into google calendar. I need the rule to put the event on the last week day if the 7th falls on a weekend. Thanks in advance.
Due to the fallback condition, I don't think you can achieve this only defining a RRULE, unfortunately.
RRULE in Google Calendar follows RFC 5545 specification.
With RFC 5545, regarding monthly recurrences, you can either set the recurring rule for a specific day of the month (e.g. always on the 7th of the month would be RRULE:FREQ=MONTHLY;BYMONTHDAY=7) or a specific offset of day of the week within a month (e.g. second to last weekday of the month would be RRULE:FREQ=MONTHLY;BYDAY=MO,TU,WE,TH,FR;BYSETPOS=-2).
Only using this specification, I don't believe there is a way to select the previous (or next) weekday in reference to the 7th day of the month.
However you can always achieve this by using a script to generate the dates or interpret an existing list you already have before insert them on Google Calendar.
I want to get first day of week for specificid ZonedDateTime in NodaTime.
But week starts Saturday in Persian calendar and Monday in Gregorian calendar.
How can I get first day of week based on calendar of ZonedDateTime?
We don't expose that information, because it's not as cut and dried as you expect it to be. Different cultures and contexts use different week rules - for example, while you've stated that the week starts on Monday in the Gregorian calendar, that's context specific. In many contexts Sunday is used as the first day of the week instead.
See the week numbering part of the Wikipedia article on weeks for examples of this.
It sounds like you'll probably want a Dictionary<CalendarSystem, IsoDayOfWeek> or possibly a Dictionary<CalendarSystem, IWeekYearRule> in your application, depending on what you're trying to achieve.
To correctly setup the calendar on my project, I need to know which day is the first of the week in Tanzania.
Seems like Google doesn't know, do you?
I am referring to the main source of internationalization data in IT-world (used for Java, C# etc.):
There is no explicit entry for TZ (= ISO-3166-2 code of Tanzania) in the weekData-section of CLDR-data. In such a case CLDR-data of unicode corporation says that the code "001" should be selected. And the data for "001" are:
Monday as first day of week and 1 as minimal count of first week in year.
I am trying to build a week view of the month with customized cells, so the Calendar class won't work for me.
I am having trouble knowing on which day the month starts. For example, January 1st was a Friday. Also, I need to know how many days a given month has.
Without telling me the exact code, can you tell me the variables or methods I could use for this?
Look at the actual code for the Calendar class here: http://github.com/codenameone/CodenameOne/
Just set java.util.Calendar to the right date then use the get method to get the day of the week.
How do we get the first day of the month and last day of the month. i am using it on a apex class.
i can get the todays date by using
date.today()
but how would i get the first and last day of the month.
Thanks
You should get familiar with the Apex Code Developers Guide as it has very good documentation for questions like this. Here's the Date methods page that you would find helpful.
With respect to your specific question, you get the first date of the month (I'll use today's month in my example) using the following
Date firstDayOfMonth = System.today().toStartOfMonth();
To get the last day of the month, use the following:
Date lastDayOfMonth = firstDayOfMonth.addDays(Date.daysInMonth(firstDayOfMonth.year(), firstDayOfMonth.month()) - 1);
I think there is a better way to solve the second problem, that is, accept the last day of the month.
firstDayOfMonth.addMonths(1).addDays(-1);