General Caster
General Caster includes a collection of automation recipes aimed at performing enhanced calculations in monday.com without using a formula column .
Complete documentation is available here.
From Timeline to Timeline Formula
Given {item.timeline}
your first Timeline column placeholder, use the following formula:
CONCATENATE(FORMAT_DATE(ADD_DAYS(LEFT({item.timeline}, 10), 7), "YYYY-MM-DD"), ";", FORMAT_DATE (ADD_DAYS(RIGHT({item.timeline}, 10), 7), "YYYY-MM-DD"))
to update your second Timeline column with a range shifted by 7 days from first Timeline.