really depends on the airport/airline and budget.
if something was planned/starting, it can be brought forward and completed earlier
eg: Changi decided to close off T2 entirely, ramp up renovations (renovations were already announced in Jan 2020 for partial closure in Feb-2020, will now complete 1 year ahead of original schedule)
https://www.businesstraveller.com/bu...nese-new-year/
https://www.asiaone.com/lifestyle/ch...vellers-expect
if something was in-progress, you almost have no choice but to continue (eg United building new EWR lounge, it was already midway. You can minimize overtime/etc, but have to continue. otherwise your permit/materials will expire and cost more to resume)
https://www.airliners.net/forum/view...?f=3&t=1451127