"Battle of Ascalon" = 146 (English Ordinal)
First Crusade: Siege of Jerusalem
Sat, 12 August 1099 = 16th of Av, 4859
ט״ז בְּאָב תתנ״ט
From and including: Friday, August 12, 1099 (Julian calendar in United States. Change Country)
To, but not including Monday, August 12, 2019 (Gregorian calendar)
Result: 336,017 days
Or 920 years excluding the end date.
Or 11040 months excluding the end date.