It is likely Crono's first day was rather rushed. Not only did he have to contend with being in a new century, but the fate of Marle and the future Kingdom of Guardia depending upon his rescuing of Queen Leene.  Both he and Lucca knew that seconds were precious and they likely spent the entire night at the cathedral in the search for the missing queen before any harm befell her.

We know Crono is accused of kidnapping the moment he enters Guardia Castle. He is likely then kept in a holding cell until a trial date is set.  When, is uncertain.

We have no way of knowing whether Crono's trial was set for the day after his capture or if he had to wait for some days before preparations were complete.  It is likely the latter occurred, yet we have no way of knowing just how long Crono remained waiting. The wheels of justice grind at a slow pace, but given the seriousness of the crime we might assume this case took top priority.  Regardless, I have charted the trial as taking place on the third day of Crono's adventure, but bear in mind this was probably not the case.

In the game the player is given the option to remain in his cell or to escape.  I rather doubt Crono could successfully execute a prison break considering the shear number of prison guards he would face.  I prefer to wait for Lucca's arrival, but it is possible Squaresoft intended for Crono to flee early.  If that is the case we can say the three days for which Crono was imprisoned may be skipped. 

Given the weather conditions of the future we can assume Crono's party likely dealt with many hardships as they crossed the land.  Because of this I believe they were prone to wear out easily and would of course make less progress than if the conditions were nicer.  

After hearing of the King's injuries and agreeing to help the Guardian knights, Crono would have likely spent the rest of the night in preparation for what he knew would be a decisive battle against an unknown enemy.  

After taking part in one of their largest battles so far, Crono's team was probably tired after the battle with Ozzie's skeletal troops and as a result spent the remainder of the evening recovering in the town of San Dorino.

We are uncertain as the overworld map's scale in Chrono Trigger. Yet we know Porre lies on the farthest tip of the southern Zenan continent.  As a result I imagine it would have taken the majority of the day to traverse such a distance so not a lot else was accomplished.

Here again Crono must travel great distances (presumably on foot).  This time not only must he travel the southern continent, but also the northern one. From there he would need to make several leaps through time before arriving in Medina and finally reaching Melchior's house outside of town.  He undoubtedly took several breaks along the way and thus further increased the time it took to arrive at his destination.

After meeting Ayla, Crono was welcomed as a guest and remained in the village as such until nightfall. He probably spent much of the day recovering and getting acquainted with the people.

The team likely trekked from Frog's home to the Magic Cave all day and arrived near sunset. It was already dark when they arrived at Magus' Castle, so the remainder of the night was spent infiltrating it and locating Magus.

Upon arriving in a new era, Crono's team saw the the fierce winds of the blizzard brewing outside and likely spent the rest of the evening huddled in the cave whilst making plans for the next day.

We don't know how far the Skyway was from Crono's point of arrival, but the snow severely impeded his progress, I'm sure.  Upon arriving in Enhasa he was likely drained of all energy and spent the remainder of the day warming up and recovering.  

Knowing that they must climb the dreadful Mountain of Woe the next day, the team would be wise to spend the night at the base of the mountain gathering information and supplies from those who live there.

Considering they had witnessed the death of their friend, the destruction of an entire kingdom, and global flooding, one can understand why the team would need a day (at the very least) to gather their thoughts and emotions.

Not wishing to confront the perils of the Black Omen at once, the team decides to heed Magus' advice and seek out the Guru of Time. They then get the preparations in order and rest until the next day when they would scale Death Peak.

Unfortunately we do not know the elevation of Death Peak.  By all outward appearances, I would speculate the mountain to be at least 12,000 ft high. Clearly this is not a hike that could be completed in a day, especially when we consider the party is made up of a group not skilled in mountain climbing.  The team likely took refuge in the caves and only made progress when the winds died down.  Not to mention it is difficult to make progress in deep snow.  For these reasons I estimate that it would have taken at least five days for the group to arrive at the summit.

With their team re-assembled and their goal in sight, Crono and his friends easily undertake short missions to further strengthen themselves and wrap up any loose ends.

After fighting many fierce battles against the Queen's toughest troops, Crono undoubtedly chose to recover at the End of Time before the final confrontation with Lavos.  Only a fool would rush to defeat the world's destroyer after already being severely weakened by an array of deadly enemies.