We have : \(2^{18}=262144=262121+23\)

Total time we can calculate since John was born until he was married is : 

\(S=2^{18}\left(h\right)+1\left(h\right)=262144\left(h\right)+1\left(h\right)=262128\left(h\right)+17\left(h\right)\)  

    \(=10920\left(days\right)+17\left(h\right)=10922\left(days\right)+2\left(days\right)+17\left(h\right)\)

    \(=1560\left(weeks\right)+2\left(days\right)+17\left(h\right)\)

Because after a week , the day that Fransisco was born was unchange so it still on Tuesday 

After Tuesday 2 days is Thurday 

So , exactly the day that Francisco was married is at 17:00 on Thursday 

2¹⁸=131072 (hours)

Francisco get married at:131072+1=131073 hours

131073 :24 = 5461,375 days

The percent of one day is:24:100= 0,24%

Because 0,5 day = 12 hours so 6 hours=0,25 day.

And 0,375-0,25=0,125(day) so 0,125 day=7 hours.

Answer:5461 days 7 hours