Udaipur: National Unity Day was observed at Udaipur Central Jail on the occasion of the 151st birth anniversary of Sardar Vallabhbhai Patel. Jail…. 1 / 2 Udaipur: National Unity Day was observed at Udaipur Central Jail on the occasion of the 151st birth anniversary of Sardar Vallabhbhai Patel. Jail Superintendent Rajpal Singh administered the National Unity Pledge to jail officials, staff members and inmates.