Ithaca’s downtown businesses hope to supplant the traditional post-Thanksgiving buying frenzies with Shift Your Shopping, a set of three themed shopping days aimed at promoting local business over big box stores this holiday season. From November 23 to 26, the holiday season will start with Plaid Friday, then celebrate Small Business Saturday, and end on a sweet note with Cider Monday. Allison Graffin, Downtown Ithaca Alliance marketing director said the weekend draws attention to both the importance and impact of shopping locally. “Plaid is the new Black,” said Local First Ithaca co-founder Jan Norman, explaining that Plaid Friday aims to shift attention away from giant corporations to independent retailers. Local First Ithaca has participated in Shift Your Shopping for several years, according to Norman.