Re: CLDR proposal: Holiday rules

From: Edward H. Trager (
Date: Thu Oct 20 2005 - 16:38:39 CST

  • Next message: Stephen Colebourne: "Re: CLDR proposal: Holiday rules"

    Hi, Stephen,

    This sounds like a difficult project when you consider how many holidays
    in many parts of the world are based on lunar calendar calculations, and so
    on. So, although it may make sense to work with CLDR for the subset of holidays
    that can be pegged to the Gregorian Solar-based calendar, you are also going
    to need to look quite seriously at all of the calendar calculation programs
    out there. But probably you guys are already aware of this. If you are interested
    in some additional resources, email me off-list and I will try to find the
    various references on calendar stuff that I have used previously.

    - Ed

    On Thursday 2005.10.20 22:40:24 +0100, Stephen Colebourne wrote:
    > Hi all,
    > I lead the Joda-Time open-source project to provide a date and time
    > library for the Java programming language -
    > A recent initiative has been to build upon our foundation datetime
    > classes to provided a much needed holiday library for Java. The purpose
    > of such a library would be for a programmer to be able to query if today
    > is a state holiday in France, or when the next Summer Bank Holiday is in
    > the UK.
    > The raw data for when holidays occur would appear to be an ideal
    > candidate for the CLDR repository. The data is based on the following
    > factors:
    > - locale, such as region/country/international
    > - organization, such as government/company/church
    > - history, holidays vary by year, 'Spring Bank Holiday' can move from
    > one date to another date, some holidays, like the 'Milenium day' happen
    > just once
    > - date rules, such as last Monday in August
    > Rather than a small project like ours attempting to categorize this, we
    > would rather work with CLDR if at all possible! (Or alternately, perhaps
    > this data is already available in a structured format, like the Olson
    > Time Zone database?)
    > We have so far developed a very *rough* first draft XML structure for
    > the data. I have attached the DTD and the data for the UK that I have so
    > far gathered to act as an example.
    > This mail is intended to gather feedback and opinions. (If its the wrong
    > mailing list, wrong process or otherwise invalid please inform me and
    > apologies!) I can be contacted privately too at this emails address if
    > desired.
    > Looking forward to feedback :-)
    > Stephen

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