The Passover celebration during the reign of Hezekiah stood as a rare moment of spiritual awakening. It bridged a massive gap of generations, returning the people to the glory days of the early Temple period. The event was unprecedented in recent history, drawing direct comparisons to the golden era of King Solomon across three main areas: the length of the festival, the sheer intensity of the joy, and the unity of the participants.
On a practical level, the festival mirrored Solomon's time because it lasted for fourteen consecutive days. The people had not traveled to Jerusalem for a very long time. Because of this absence, the standard seven days of the festival felt like too little time. To make up for the lost years, they decided to add another seven days of celebration. A continuous two-week festival of this scale had not taken place since King Solomon dedicated the First Temple ([רש״י, רלב״ג, מצודת דוד]).
The immense joy of the occasion was actually a direct result of the long period of disconnection that came before it. While there might have been a larger number of pilgrims during Solomon's reign, the emotional intensity under Hezekiah was uniquely powerful because the experience felt completely new. For many years, under the rule of wicked kings like Ahaz, the people were entirely prevented from making the pilgrimage. Returning to fulfill this Commandment after such a long pause sparked a level of enthusiasm and joy that simply did not exist when the pilgrimage was a regular, expected routine ([רש״י, ביאור שטיינזלץ]).
Finally, the celebration echoed the days of Solomon because it represented a profound moment of national unity. Solomon's reign marked the last time all the tribes of Israel were completely united around Jerusalem. Following his rule, the kingdom split apart, and the ten northern tribes stopped coming to the city. For the first time since that historic division, all the different parts of the nation gathered together to reunite in Jerusalem ([מלבי״ם]).