Time within the star system is incredibly lengthy, yet at the same time it's trivial, just like how Finn Lewis and his team had already spent over a month, nearly two months, to reach this region, although originally the Luna Starfield 2 had found the message that the enemy was preparing to amass forces for an attack.
But this period too was a lengthy one. Just think, on Earth, if two countries wanted to go to war, just the mobilization of troops and materials would take an extensive amount of time. A war, especially a major one, would require preparations of at least half a year to a year.