A delegation from Nova Scotia is in Boston for a special Christmas tree lighting ceremony.

Provincial cabinet minister Andrew Younger will be on hand when the 15-metre spruce — a gift to the city of Boston — is lit up with decorative lights at 8 p.m. at the Boston Common.

The provincial government said the delegation will be on the streets of Boston at noon to greet, entertain and thank Bostonians for providing medical help and supplies after the Halifax Explosion in 1917.

About 2,000 people were killed and hundreds more were left injured and homeless by the explosion, caused by the collision of two ships in Halifax Harbour.

As a thank you, the city of Halifax sent Boston a Christmas tree in 1918. More than half a century later, in 1971, the Lunenburg County Christmas Tree Producers Association revived the gift and began an annual tradition to promote Christmas tree exports.

The tradition was later taken over by the province of Nova Scotia to continue to promote trade and tourism.

Later today, the delegation in Boston will be handing out Nova Scotia tuques and offering a chance to win a trip to Nova Scotia on the new ferry between Portland, Maine and Yarmouth.