You mean American Tax Day?
The Hebrew Calendar is a luni-solar calendar which means that it follows the months of the moon and eventually corrects itself by making some years 13 months as opposed to the usual twelve because lunar months are 29-30 days as opposed to 30-31 days. Therefore the exact equivalent to April 15th is dependent on the year as well. As a general guess, it would be in mid-to-late Nissan or early Iyyar.
12 calendar months from April 15, 2010 is Friday, April 15, 2011.
On the proleptic Gregorian calendar, which is the Gregorian calendar extended to dates before its existence, it was a Thursday. On the Julian calendar, which the Gregorian calendar replaced in 1582, it was a Saturday.
Calendar.
The modern-day Jewish calendar has a leap year periodically that adds an extra month, so the Passover is a month after Christians recognize the day of Jesus' death in 2016. The memorial of Christ's death is celebrated by Christians according to the way the calendar was back in Jesus' day, and that he died on the first full moon after the Spring Equinox on Nisan 14.In 2016, the Spring Equinox is March 20, and the first full moon is the 23rd. That is why the 2016 Memorial of Jesus Christ's death is on March 23 and that would have been Nisan 14 back before 70 CE. The Jewish, however, start celebrating the Passover on April 22 in 2016, which is Nisan 14-15 according to the modern calendar. The modern-day Jewish calendar was instituted some time after the death of Christ and after the destruction of the temple.
There are Four Traditional New Years in Judaism. 1) Rosh Hashanah (Tishrei 1) This is when the calendars restart (i.e. Year 2000 -> 2001 etc.) 2) Nisan 1: The First Day of Jewish Liberation from Egypt. 3) Tu B'Shvat (Shvat 15) The birthday of the Trees. 4) Your Own Personal Birthday on the Jewish Calendar.
April 15 1917 was a Sunday.
15 April 2000 was a Saturday.
15 April 1980 was a Tuesday.
15 April 1959 was a Wednesday.
15 April 1944 was a Saturday.
15 April 1978 was a Saturday.
15 April 2006 was a Saturday.