Normally I use the form that is shown in the documentation in my case it would be like this
{% url 'student: make_theory' temario.pk%}
and so it works well, the problem is that I want to pass in addition to temario.pk the current time when the function is called if you used "," to separate gives error and leaving equal space, to get the time I am using the label "now", I do not know if that is the problem, I appreciate any contribution.