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First you need to convert the date to a datetime
object. In your case convert '2022-01-01'
as:
from datetime import datetime
date_object = datetime.strptime("2022-01-01", "%Y-%m-%d")
# Then you can filter it as
qs = Data.objects.fitler(created_at__date__lte=date_object)
Source:stackexchange.com