The National Aquarium in Baltimore will offer its Fridays After Five discount year-round, the Aquarium announced this week. The Friday program, which has been running in the fall and winter, began earlier this month, allowing visitors to pay $12 admission to the Aquarium starting at 5 p.m. on Fridays. That’s less than half of the regular adult price of $34.95. The $12 price is available through March. During the winter, the Aquarium will announce Fridays After Five pricing starting in April.