When Jack came out of the Order of Magi, it was midnight already. It was a bit late to go to Amy's bakery, he didn't want to disturb their sleep. So, he teleported back to Heavenly Citadel. He installed the Mana Gathering Stone in the Time Chamber before calling it a day and rest.
In the morning, everyone was gearing up to join the army outside the capital. John and Jeanny had left early, they were joining the army right from the start. John had planned for another march full of formation training. Since the number of outworlder army was much more than during the civil war, it would take much more effort in organizing. Luckily, most of the top guilds who were with them during the civil war already knew the drills. So, John spread them out among the outworlder army to help oversee the drills.