XFA Specification
Chapter 17, Locale Set Specification
716
The day element
An element to describe the name of one of the days of the week.
<day>
...pcdata...
</day>
Content
The data-content is interpreted as the name of the week. Specifically, the first occurrence of this element
specifies the name of the first day of the week (Sunday).The second occurrence of this element specifies
the name of the second day of the week (Monday), etc...The seventh and last occurrence of this element
specifies the name of the seventh day of the week (Saturday).