On April Fool's day people are encouraged to just lie, even some believers participate in lying on this day.

Teach your children lying is a sin, its wrong.

Proverbs 26:18-19(NKJV)

Like a madman who throws firebrands, arrows, and death,

Is the man who deceives his neighbor,

And says, “I was only joking!”

Proverbs 13:5 (NKJV)

A righteous man hates lying,

But a wicked man is loathsome and comes to shame

Proverbs 12:22 (NKJV)

Lying lips are an abomination to the Lord,

But those who deal truthfully are His delight.

Revelation 21:8 (KJV)

But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and All liars, shall have their part in the lake which burneth with fire and brimstone: 

which is the second death

Ephesians 4:25 (KJV)

Wherefore putting away lying, speak every man truth with his neighbour:for we are members one of another

God Bless

Raul D