Besides, self-declared data tends to be more accurate and reliable. So why can't he access a partially filled-up form and fill in the few remaining fields during the house visit, saving time and effort?" an officer told TOI.The population enumeration exercise is set to be conducted nationwide in Feb 2027. However, the exercise, as per convention, is advanced for select states/UTs like Ladakh, J&K, HP and Uttarakhand that become wholly or partially snow-bound in Feb. These areas will witness population enumeration from Sept 1 to 30, preceded by a self-enumeration window of Aug 17-30.