The 1st of November, celebrated in Poland as a holiday, is not the Feast of the Dead, as the communist authorities in Poland wanted (because it could be a holiday of the dead, ghosts, monsters, vampires or anyone, just not saints).
The dead don't celebrate anything on this day... at least not in Poland.
It is a holiday of the living, who want to express their respect and love for their ancestors, for their loved ones, absent in body, but who are still present among us, the living. It is, in a sense, the feast of immortality, a feast during which the memories of those who have passed away are revived, but are still alive in our hearts, memories and remembrance.
The religious tradition of this feast dates back to ancient times, especially to the first four centuries, when Christians were tortured and murdered by religious opponents and when, despite this persecution, they did not renounce their faith. As we would say today, Christians were tortured and murdered purely for their beliefs, for sticking to their religion.
Persecution for politically incorrect views was not just a speciality of the ancients, because in modern times too, when all tolerance is placed on a pedestal as a fundamental value, adherence to incorrect views can expose one to severe consequences, and even to punishment by the supposedly tolerant official authorities.
For many Poles this day has a special meaning, not only religious or family, but also historical and even patriotic. Under Communist rule, a large number of people who wanted an independent Poland were murdered for their politically incorrect views, and their corpses were buried in secret places so that their memory would never be preserved. It is only recently, after only one generation, that one has been allowed to look for the burial place of these people, often only setting up symbolic graves for them. Graves on which it is now possible to light a candle, lay flowers and say a prayer to honour their memory. And it is on this All Saints' Day, lit by thousands of candles, that graves sometimes tell stories, including politically incorrect ones, because graves are not afraid of punishment.
All Saints' Day is a celebration of remembering the past, as opposed to celebrating what is now, already... and what will be past in a moment. And it is a message to the future not to live only in the moment, what is now.