The calendar means a lot to me,” writes Canada-based Priyank Thatte in his blog. “It’s almost a part of who I am and part of my upbringing and culture. It makes me nostalgic, and in a place where everything is ‘foreign’, this is one of the few things that is not.” Thatte’s post, and many others like his, is about Kalnirnay, the calmanac (calendar + almanac) that’s been a staple in millions of Indian households for nearly 40 years. Kalnirnay, the Hindu panchang presented in a format that is convenient for general public consumption, is the largest-selling publication of its kind in the world.