“Harry Potter and half blood prince” a whopping $58.4 million domestically in its first day. That’s the best single ay haul yet for the franchise and the fourth best gross ever. Receipts include a record $22.2 million from midnight screenings alone. The sixth installment in the “Harry Potter” series had the second-highest debut ever for a movie opening on Wednesday. It trailed only “Transformers: Revenge of the Fallen,” which premiered with $62 million last month. The two ear lag since the fifth “Harry Potter” movie was the longest in the franchise’s history.