The user can store certain preferred settings through the user preferences dialog.
the user preferences dialog
In box Sunday / Sabbath a special day such as Sunday, Saturday or Friday that is to be highlighted in the year overview can be selected.
In list box Day of week the day of week for the special day can be selected
In the box Color the color for the special day is selected. To set a color, press the button next to the color field and choose a color in the color picker dialog.
In list First day of week the day that a week starts with can be set. This weekday will be shown in the leftmost column of each month box.
In box Header color the color is shown that the week day header of each month box is rendered in. Press the button next to the header color box to select a color from the color picker dialog.