Who: Indian Railways
What: Rechristened Haridwar Mail as Yoga Express
When: 15 June 2015
Indian Railways on 15 June 2015 rechristened train No 19031/19032 Ahmedabad-Haridwar Mail Express also known as 'Haridwar Mail' as Yoga Express. The name was changed with immediate effect. 
However, there will be no change in the train timings and its composition.
Union Government is observing International Yoga Day on 21 June 2015.