the day and night (or two days and nights) before a family leaves for a generally long vacation (week to month)

The 'vacation rush' usually inclues parents in nasty or angry moods and sometimes even includes yelling, while the kids run around trying to get their bags packed

Some other symptoms could also include lack of clothing detergant... (Thus, the rushing to the store to buy detergant)

When you eat dirt for the first time and leave your family to build a shack in the woods