Specifies the view options for the calendar.

• Decade - Displays the calendar with a year-by-year view of a single decade.
• Month - Displays the calendar with a day-by-day view of a single month.
• Year - Displays the calendar with a month-by-month view of a single year.

Specifies the format of the day names in the week header.

• Abbreviated - An abbreviated format (for example, 'Sun').
• Narrow - A narrow format, typically a single letter (for example, 'S').
• Short - A short format, typically 2–3 letters (for example, 'Su').
• Wide - The full-length day name (for example, 'Sunday').

Specifies the rules used to determine which week is considered the first week of a calendar year.

• FirstDay - The first week begins on January first, regardless of which day of the week it falls on.
• FirstFourDayWeek - The first week must contain at least four days of the new year, following the ISO standard definition.
• FirstFullWeek - The first week begins on the first occurrence of the designated weekday on or after January first.