def DAY_OF_YEAR(expression):
return {'<STR_LIT>': expression}<EOL>
Returns the day of the year for a date as a number between 1 and 366.
See https://docs.mongodb.com/manual/reference/operator/aggregation/dayOfYear/
for more details
:param expression: expression or variable of a Date, a Timestamp, or an ObjectID
:return: Aggregation operator