WallClock
A clock on a sign that displays the time in the minecraft world, or it can display the time in the real world. Customizable, easy to use, and easy to set up.
A wall of clocks

Making a game clock

Usage
All clocks must be placed exclusively on a wall. Stand alone signs are ignored as clocks.
Basic Game Clock
To create a simple clock showing world time, create a wall sign with the following on the first line:
[gameclock]
Advanced Game Clock
To create a more advanced clock, create a wall sign with the following:
[gameclock]
ClockLabel
(unused)
Format
ClockLabel becomes "as is" line 2 on the clock. When no label is specified, it defaults to "Time" for Minecraft world clocks, and the short hand timezone for clocks showing time in real world.
The third line is unused and any text is ignored.
Format alters how the time is displayed. This text is passed to Java's SimpleDateFormat class, so see that doc for all the formats available. Clocks default to 12hr time, or as otherwise specified in the config file.
Note: All fields are optional and independent of each other
The Real World
To create a clock that displays the real time, make a sign with the following on the first line:
[realclock]
Advanced Real World Clock
To further customize your clock, create a wall sign with the following:
[realclock]
ClockLabel
TimeZone
Format
ClockLabel becomes "as is" line 2 on the clock. When no label is specified, it defaults to "Time" for Minecraft world clocks, and the short hand timezone for clocks showing time in real world.
TimeZone affects the timezone of clocks displaying real time, otherwise it is ignored. By default, the system timezone is used, but it may not be correct depending on what OS the server is running on due to a bug in Java.
Format alters how the time is displayed. This text is passed to Java's SimpleDateFormat class, so see that doc for all the formats available. Clocks default to 12hr time, or as otherwise specified in the config file.
Note: All fields are optional and independent of each other
Example
To create a clock with the label "IRL Time", displaying the Real world time in 24 hour format with a GMT offset of +1 hours, make a sign with the following:
[realclock]
IRL Time
GMT+1
HH:mm
Commands
The idea driving the plugin is the ability to create a clock without leaving the 'world' of minecraft by opening up the chat window, and as such there are almost no commands. The commands presently provided are available to the console and OPs only for maintenance and other mischief tinkers want to get into.
/wallclock save
Manually save all the clocks in the world to disk ("plugins/WallClock/clocks.csv").
/wallclock load
Manually load the saved clocks from disk ("plugins/WallClock/clocks.csv"). This WILL render any new clocks created since the last save non functional.
Source included with the jar