A view of Port Sultan Qaboos in Muscat. With a country still in mourning for its former ruler and an ailing economy, National Day celebrations will be muted this year. Getty Images 
A view of Port Sultan Qaboos in Muscat. With a country still in mourning for its former ruler and an ailing economy, National Day celebrations will be muted this year. Getty Images 

Oman to start levying a 5% VAT in six months as it looks to boost revenues