I think "tie in with" means "agree with". Do you think it is used appropriately in the following context? Could I use "conform to" to replace it? Could you specify the reasons?
The theme of this year's World Meterological Day is "Understanding Global Impact". The theme also tied in with International Polar Year.
The theme of this year's World Meterological Day is "Understanding Global Impact". The theme also tied in with International Polar Year.