How do I change the first day of the week, weekend days, holidays, rokuyo or the lunar calendar?

Open the menu (≡) at the top left of the Notes screen → "Settings" → "Calendar Settings".

• "Start of the Week" — choose the day shown at the left edge of the calendar
• "Holidays" — choose the days of the week to color as days off
• "Show Holidays" and "Show Rokuyo" — turn Japanese public holidays and rokuyo on or off (shown only when the app's language is Japanese)
• "Lunar Calendar" — turn lunar calendar dates on or off (shown only when the app's language is Vietnamese, Korean or Chinese)