Catholics Admit Halloween is Catholic Holiday

Abstain from all appearance of evil. 1 Thessalonians 5:22

"Is the holiday known as “Halloween” Catholic?
The first happy hint is in the word “holiday.” Holiday comes from

the word “Holy Day”—that is, from the holy celebrations and feasts of the Church.
Yes, Halloween is Catholic.
As noted above, however, it is the “true and original substance” of Halloween that is Catholic.
The violence, gore, sensuality, occultism, and demonic aspects now associated with Halloween are not, in fact, true to its origins.

Christians and non-Christians now fail to realize that Halloween is a hijacked holy day. Both are convinced it has pagan origins.

The result is that Catholics react in one of three ways. They either 

1) go with the flow, celebrating Halloween in a secular way and not giving the holiday much thought or 

2) insist that Halloween should not be celebrated at all or 

3) insist that Halloween needs to be “baptized” and turned into a harmless holiday. The word “Halloween”—or “Hallowe’en”—comes from All Hallow’s Eve.

All Hallows Eve is the vigil celebration of All Saints Day—also known as All Hallows Day.
The word “hallow” means “holy.” 
All Saints Day is a Holy Day of Obligation, and a major feast on the Church’s liturgical calendar.
All Saints Day honors not only the saints in heaven whom we know by name, but also the countless saints in heaven whose names are unknown to us.

The exact origins of [All Saints Day is] uncertain, although, after the

legalization of Christianity in 313, a common commemoration of Saints, especially the martyrs, appeared in various areas throughout the Church…
The primary reason for establishing a common feast day was because of the desire to honor the great number of martyrs, especially during the persecution of Emperor Diocletian (284-305), the worst and most extensive of the persecutions." GoodCatholic.com