If I remember correctly,6 June 06(666) was believed to be the doomsday(or a very bad day indeed) but nothing happened.And the second week of April 2007 was Friday the 13th but then also nothing happened!
This means that these dates and all that are crap and i guess these are just the imaginations of some foolish people who want to throw their facts and philosophy on us.
BUT,ghosts do exists.I am sure of that because i and my family have personal experience and if i disclose them here than nobody will dare to deny the existence of spirits,ghosts,ghouls and witches.
One more incidence which i don't know is true or not.
in the mid 19th century my grandmother's nana(mother's father) was coming back from farms(in Punjab) late night.Near a market,he saw a lady with white hairs,ugly face,yellow teeth.He instantaneously identified her as a witch.He grabber her hairs in his fist.It is a saying that witches can be controlled if we grab their hairs .She ran away.Scary !