منتدى الفرح المسيحى - This is collective worship (and is other than special individual fasts)

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Pope Shenouda III

Fasting of the whole nations

This is collective worship (and is other than special individual fasts).
For in doing this, the people's hearts meet together in self-abasement before God.
As Christians pray together with one soul and spirit offering their prayer to God "with one accord" (Acts 4:24), and also offer well as their private prayers, so it is with fasting:
There are many examples in the Holy Bible of collective fasts in which all the faithful participated, together and with one spirit, presenting a unified fast to God, the same fast for the whole church.