Father’s Day Special – $4 off all t-shirts! TODAY ONLY!. $4 discount applies to one or more Zazzle apparel items. Enter promo code DADDYTEEDEAL at checkout to receive the discount. Offer is valid through June 3, 2010 at 11:59pm PT. This promotional offer may not combine with any other Zazzle promotional or volume discount offers. If a volume discount applies to your order, you will receive either the discount set forth in this offer or the standard volume discount, whichever is greater. Offer valid on Zazzle.com only.