This plugin allows you to add custom countdown placeholders for your server.

Installation:
drag/drop .jar file into you plugins folder and restart server.

Commands:
/timerplaceholders help
/timerplaceholders reload
/timerplaceholders start/stop [placeholder name]

Config:
example:
enabled: true/false
repeat: true/false
reset-on-restart: true/false
interval:
days: 10
hours: 20
minutes: 30
seconds: 40

Using Placeholder (eg in scoreboard or tabs)
%example% - Will display countdown timer for example