Possible Clues:

• Month named for a general
• The Fourth time
• What the beginnings of 17-, 25-, 40- and 52-Across are each a fourth of, phonetically
• Blue jays abandon base for one of those in 26 across
• Month named for a Caesar
• Bastille Day's month
• 7, monthwise
• Part of the calendar named for Caesar
• When the dog days start
• Winter time in Melbourne