Well...
"Today, like many other days, I' have had an interesting morning"
In spanish
"Hoy, como otros días, Yo he tenido una mañana interesante"
So, the first have is the auxiliary of present perfect for that reason have = he (remember that the verb is conjugated); and the second have is the verb to complete the structure so had = tenido.
PSDT: In spanish isn't necessary to put Yo, because verbs are conjugated and we already know what is the subject.
Good Luck!!!