New countdown system and better time formatting.
Please delete your old messages.yml and replace it with a new one if you want to use default messages with the new variables. (Downloaded from here of automatically generated by AdvancedRegionMarket).
Added new variables:

%extendtime-short%
%extendtime-writtenout%

%remaining-date%
%remaining-countdown-short%
%remaining-countdown-short-cutted%
%remaining-countdown-writtenout%
%remaining-countdown-writtenout-cutted%

%maxrenttime-short%
%maxrenttime-writtenout%

%takeoverin-date%
%takeoverin-countdown-short%
%takeoverin-countdown-short-cutted%
%takeoverin-countdown-writtenout%
%takeoverin-countdown-writtenout-cutted%

%inactivityresetin-date%
%inactivityresetin-countdown-short%
%inactivityresetin-countdown-short-cutted%
%inactivityresetin-countdown-writtenout%
%inactivityresetin-countdown-writtenout-cutted%

%remaininguserresetcooldown-date%
%remaininguserresetcooldown-countdown-short%
%remaininguserresetcooldown-countdown-short-cutted%
%remaininguserresetcooldown-countdown-writtenout%
%remaininguserresetcooldown-countdown-writtenout-cutted%