[Koha-bugs] [Bug 18455] New: Holiday range has incorrect starting date when crossing a weekly holiday

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=18455

            Bug ID: 18455
           Summary: Holiday range has incorrect starting date when
                    crossing a weekly holiday
 Change sponsored?: ---
           Product: Koha
           Version: 16.11
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5 - low
         Component: Holidays
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: marka at pobox.com
        QA Contact: testopia at bugs.koha-community.org

Created attachment 62359
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=62359&action=edit
Screen shot of calendar after creation of two holidays mentioned in
description.

When a holiday of type "Holidays on a range" is created with a date range that
overlaps a holiday of type "Holiday repeated every same day of the week", the
starting date of the range is changed to a month or two earlier, creating a
large number of incorrect holidays.

To reproduce:

Start with an empty calendar.

Create a holiday on a Wednesday and give it type "Holiday repeated every same
day of the week".

Create a holiday on a Tuesday (e.g., May 2 2017) with an ending date of a
Thursday (e.g., May 4 2017) and a type of "Holidays on a range".  This will
create a set of single holidays starting on a day much earlier than the
user-specified start date.  On my system (16.11.06.000) it created holidays
starting on March 30 2017.

See attached screenshot for the result.

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