Guess Harvest What Date and Time will Harvest Begin? Enter for a chance to win a $50 Gift Certificate and other Brooks gear. No purchase necessary to enter. Good luck! Guess Harvest *First Name *Email *What day will Harvest 2015 begin? Format: mm/dd *What time on that date will Harvest begin (PST). Format 24H: 00:00 Leave this field blank: Submit Must 21 or older to enter. Void where prohibited.