<span style="color: #222222;">A pre-test of the Census 2021 will be carried out across the country from 12th of August to 30th of September this year. This was announced in a notification issued by Registrar General and Census Commissioner Vivek Joshi. </span><br />'' <span style="color: #222222;"><br />'' Our correspondent reports that the reference date for the census is 1st October, 2020 for Jammu and Kashmir and snowbound areas of Himachal Pradesh and Uttarakhand. The reference date for the rest of the country is 1st March, 2021.</span><br />'' <span style="color: #222222;"><br />'' This time, data is proposed to be collected through a mobile app and enumerators would be encouraged to use their own phone. The census 2021 will be one of the world's largest enumeration exercise. </span><br />