class Now [source]
 
 New in Django 1.9. 
Returns the database server’s current date and time when the query is executed, typically using the SQL CURRENT_TIMESTAMP.
Usage example:
>>> from django.db.models.functions import Now >>> Article.objects.filter(published__lte=Now()) <QuerySet [<Article: How to Django>]>
PostgreSQL considerations
On PostgreSQL, the SQL CURRENT_TIMESTAMP returns the time that the current transaction started. Therefore for cross-database compatibility, Now() uses STATEMENT_TIMESTAMP instead. If you need the transaction timestamp, use django.contrib.postgres.functions.TransactionNow.
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