The Manx Grand Prix racing previously planned for Friday has been brought forward to tomorrow.
The decision has been made by Clerk of the Course, Gary Thompson, as bad weather is forecast for Friday.
As a result, Thursday will see roads on the TT course closed from 11.30am and are expected to re-open at 4.50pm.
The day will see the MGP Light and Ultralightweight race take place from 12.15pm followed by the Senior race at 2.35pm.
Fuel website launches after queues at pumps this week
Inquest hears how well-known businessman died following crash
Woman thrown out of House of Keys for heckling chief minister
Chief Minister rules out fuel rationing and duty cut
Heating oil company says price rise "pulling at heartstrings"
Foxdale seagull farm importing birds in bid to boost numbers
Vehicle services move online today
Fuel price hit may last into winter, says government