When it was just Bulk, he worked for twelve hours, from eight to eight, all six days a week (which had been news to Neil, learning that the ponies only had six days a week). After that, two of his four Lunar guards would work a six-hour shift, then change with the other two. Now, with an entire patrol of Solar guards, shift change was at six in the morning for Calm and Squall, at noon with Bulk and Hearth, then at six in the afternoon, and finally at midnight for the Lunar guards.