If the month doesn't match the config's month, placeholders will interpret the %adventurecalendar_timeuntil_next% and %adventurecalendar_next% placeholders as the first present.
The filler item material is now configurable and can be changed from gray stained glass.
An option to sort presents has been added, so the GUI shows them in order.
An option to display time in a simpler manner has been added (1.3d or 4.6h or 41.4m).