Columbine happened on Jewish memorial Day. This year it's on 5/8

Columbine happened on Jewish memorial Day. This year it's on 5/8

Yom HaZikaron / יום הזכרון
Israeli Memorial Day. Note that Hebcal displays modern holidays like Yom HaZikaron according to the Israeli schedule. Although Yom Hazikaron is normally observed on the 4th of Iyyar, it may be moved earlier or postponed if observance of the holiday (or Yom HaAtzma'ut, which always follows it) would conflict with Shabbat.

Tue, 20 April 1999 = 4th of Iyyar, 5759
ד׳ בְּאִיָּר תשנ״ט
Yom HaZikaron / יום הזכרון
19th day of the Omer

Yom HaZikaron begins at sundown on Tue, 07 May 2019.

Wed, 8 May 2019 = 3rd of Iyyar, 5779
ג׳ בְּאִיָּר תשע״ט
Parashat Kedoshim (in Diaspora)
Yom HaZikaron
18th day of the Omer

Tue, 20 April 1999 = 4th of Iyyar, 5759
ד׳ בְּאִיָּר תשנ״ט
Yom HaZikaron / יום הזכרון
19th day of the Omer

"Yom HaZikaron" = 66 (Full Reduction)
"thirty three" = 66 (Full Reduction)
"Yom HaZikaron" = 156 (English Ordinal)
"thirty three" = 156 (English Ordinal)
"Yom HaZikaron" = 576 (Satanic) sq rt 24