Feb 27 15th recorded perihelion passage of Halley's Comet in the year 0837.
Apr 10 On this day in history comet 1P/837 F1 (Halley) approaches within 0.0334 AUs of Earth
Apr 13 On this day in history best view of Halley's Comet in 2000 years
Important Dates And Events In History - Hisdates.Com