I am looking to make a calender app and need help making a Julian Day time class with the below specifications.

Julian day class.

a$.$ Default constructor that initializes to now $($accurate to a second$).$

b$.$ A literal constructor that takes a real number.

c$.$ All seven relational operators.

i$.<=>$

ii$.==$

iii. $!=$

iv$.<$

v$.<=$

vi$.>$

vii. $>=$

d$.$ Methods$/$operators for adding$/$subtracting: seconds, minutes, hours, days, weeks, years $($orbital$).$

e$.$ Difference operator