I need help on this.
Do I say
Save time in your morning routine
or
Save time on your morning routine
?
The context: a beauty procedure that simplifies women's makeup routine.
Thank you for your answers.
On would be the best preposition. You usually use In when referring to periods of time such as seasons, months, centuries, etc. whereas On is used to describe scenarios of "close proximity" or specific descriptions of time such as days or parts of the day. One exception is when using it for "in the morning", "in the afternoon". But your sentence is not using it in that way, so the best choice would be On.