Advance booking for a hill-station resort opens exactly 60 days before the stay. The stay begins on the circled date. When does booking open?

Count back from 15 March: 15 days to 28 February (back 15), 28 more to 31 January (back 43), and 17 more to 14 January (back 60). 60 = 8 weeks + 4 days, so Monday − 4 = Thursday. (Friday, 15 January counts back only 59.)