All Hallows Eve

October 31st is Reformation Day and the day following is All Saints' Day: 

Reformation Day is the anniversary of the day Martin Luther issued his challenge to debate his 95 theses—not the beginning of the Reformation but an important point in it. Halloween is actually All Hallows Eve, the evening before All Saints’ Day. Days were thought of as evening to evening so the eve was the beginning of the next day—think New Year’s Eve or Christmas Eve. Although today most approach it as a secular holiday that wasn’t its origin and for Protestants, all believers are “saints” and All Saints’ Day is when we acknowledge “the great cloud of witnesses” who have passed on. So on Halloween, we can celebrate both the Protestant Reformation and all those believers who have gone before.

Therefore being justified by faith,

we have peace with God through our Lord Jesus Christ:
By whom also we have access by faith into this grace wherein we stand, and rejoice in hope of the glory of God.

Romans 5:1-2 [KJV]