Mondays through Wednesdays as follow
Mondays: 3:00 to 4:30 PM
Tuesdays: 8:00 to 9:00 AM and 11:30 AM to 1:00 PM
Wednesdays: 3:00 to 4:00 PM
Nonetheless, I hold "unofficial" office hours "on-demand" before and after classes (when scheduling allows it). Also, student can come to see me to discuss any academic issue when I am working in a lab, just send me an email to check when I am going to be working in Sierra 102 or 109. I often check my Inbox in CANVAS, so that's also a good way to contact me for an appointment or to ask a question.