Date/Time - using JodaTime to calculate "today" or "tomorrow" from a delta between Now and a given future time

Setup, Configuration and Use Scripts & Rules
2

The easiest is probably to get the timer’s time in milliseconds epoc. Then it is as simple as:

if(now.withTimeAtStartOfDay.plusHours(24).isBefore(timer.millis)) "TODAY"
else if(now.withTimeAtStartOfDay.plusHours(24).isAfter(timer.millis)) "TOMORROW"