Regional passport office walk in appointment question

Hi Doonites, I have a question on walk-in appointment at regional passport 12, New Road, Aroma Hotel, Dehradun for passport application. Actually passport application is on hold and they have asked for additional document. On passport india website it is displaying next appointment in February, but I got to know from someone that the Regional Passport Office near MKP college issues walk-in appointments for certain days(I think Tuesday or Thursday). So could anyone please let me know which are the exact days of the week on which walk-in appointments are accepted? Asking because I will be travelling from another city to Dehradun so want to be sure I am travelling on the right day of the week.