Add option for new formats of date. (like AM/PM, without seconds, etc.)
Add option for next data on marial. (like colors for wool etc.)
Add timezone support (Added option to add minutes to clock)
Add option to show ingame time
Add countdown mode
Add showing of clocks for every player differently
Add some settime command, that allows you to change clock time to specified
When setting material, make avaible entering names of blocks
Add shorter command /dc (instead of /digitalclock)
Add info message when update is available
Add better permissions for fill and material command, to allow players only set certain blocks (e.g. digitalclock.fill.grass or digitalclock.material.stone)
A stopwatch mode
Better system for setting look of numbers, e.g. something like schematics...
Change rotating system to yaw/pitch with degrees (e.g. -180, 90, 270, ...)