Related Clues:

• Memorable
• Kind of day
• Important, in a way
• Memorable, as a day
• This day is memorable due to scarlet missive
• This day is memorable - hence scarlet missive
• Scarlet missive for memorable day
• This day is memorable for scarlet missive
• Scarlet missive to signal memorable day
• When it's important by day to have studied the correspondence, by the sound of it
• Persued the epistle, by the sound of it, for the important day
• Sounds as if one studied one's correspondence for an important day
• Sounds as if one studied the missive for the day that's important
• An important day to have perused the missive, by the sound of it
• By the sound of it, studied one's correspondence for an important day