The two-day trade event, which was originally set to take place on 14 February and 15 February, will now be held on 11 May and 12 May at Sandown Park, Surrey.
Meanwhile, PATS Telford 2021 will still take place on 26 September and 27 September in 2021.
According to organisers, the decision was made following recent announcements by the government on the Covid-19 pandemic, as well as the “fact that exhibition halls around the country weren’t able to re-open as planned this month”.
They added that bookings for the event are “already at an impressive level, proving there is a real thirst for the return of ‘live’ trade exhibitions”, while “the overwhelming majority of exhibitors have told PATS organisers they are very happy with the move of dates”.
PATS Sandown organiser Gordon Thomas said: “We look forward to welcoming the pet industry back through the doors of PATS Sandown in May next year.
“Moving to late Spring makes it much easier to stage the Sandown show and allows us to deliver a high-quality event that is expected of a PATS exhibition.”
He added: “PATS Sandown will be the first UK pet trade exhibition to be staged in 2021 where the whole industry will finally be re-united under one roof.
“We’ll be working hard with exhibitors and visitors to make both PATS 2021 shows a huge success for everyone involved.”