- Month-wise Indian Standard Time (IST) of Sunrise and Sunset (Suns Upper Limb) in Kolkata Station of West Bengal (2004)
- Month-wise Indian Standard Time (IST) of Sunrise and Sunset (Suns Upper Limb) in Kolkata Station of West Bengal (2003)
- Month-wise Indian Standard Time (IST) of Sunrise and Sunset (Suns Upper Limb) in Kolkata Station of West Bengal (2000)