Max Prayer Day range
Prayer Day is an Event which occurs when the player outpost is within 2,000 meters of a Holy Nation location, and not within a no-go zone. Its initiating event will have up to a 50% chance each day of triggering, if you are based 1,500 meters or closer to a Holy Nation owned location. The chance will scale down with distance, reaching 0% chance at 2,000 meters or more.
It consists of a squad of 5 High Paladins and 4 Holy Servants led by a Holy Priest, the last of which will require an audience. It‘s recommended to speak with the priest with a male Human with a copy of The Holy Flame book on his inventory. In case of lacking one, the priest will provide a copy the very first time for free. This limit is per game, not character.
If ignored for long enough, or if the interaction goes poorly, they will leave and a Holy Nation Assault (Minor) will be launched 36 to 48 hours afterward. In some cases, if the player speaks the prayer incorrectly or attacks the priest, they will assault the base and the Holy Nation Assault (Minor) will be launched 12 to 24 hours after.
If all the available characters are female (even if they are female Greenlanders), the priest will say the following lines.
"Woman, are there no men to speak with me?
Wait... are there no men on this outpost? It is against sacred law to take up residence without brotherly guidance...
This will not do... This will not do at all. You are not welcome here... you will be removed."
The priest and his squad will then leave and a Holy Nation Assault (Minor) will be launched in 12 to 36 hours. There are no dialogue options available to the player during this conversation, and having a copy of "The Holy Flame" on the character that talks to the Prayer Day leader makes no difference.
It's also worth noting that if a non-human interacts with the priest, they will leave and a Holy Nation Assault (Minor) will be launched in 10 to 20 hours.
As soon as the Prayer Day is done another one should appear on the "Events" page, and will launch in 100 to 160 hours. This event will stop happening if any of the following is true: you are an enemy of the Holy Nation, you are allied with either the Flotsam Ninjas or the Shek Kingdom, or if the Holy Lord Phoenix has been killed or imprisoned.
Arguably, out of all of the major factions, the Prayer Day is the least damaging of Tax Events to a player, as the Holy Nation only takes the player's time. The Shek Kingdom and the United Cities hurt the player in more substantial ways.
Like most tax Events, if the campaign is defeated by a third party faction like bandits or wild animals on the way to the player's outpost, it will prevent any future tax visits from the faction until the player's next import. This is due to the long repeat limit timer, and the fact that it doesn't consider being defeated by a third party as the player killing them. This can be exploited by purposefully luring hostiles to the event's forces while they en route to the player's base.