sir.,
10-02-2019; 11-03; 10-04; 9-05;7-06;6-07-;5-08;3-09;2-10; 1-11; 1-12; 31-12-2019 are masikam days. on the previous day sodakumpam must be done. 27th oonam on any one day 28th;29th;30th day. for 45th oonam on any one day from 41 to 45 days; 6th month oonam on any one day from 171th day to 180th day. oona aapthiikam on any one day from 341st day to 355th day. onnam should not be done on kartha"s birth star day, on tuesday, friday, saturdays. prathamai, sathurthy, shashti, navami, ekaadasi, chathurdasi, thithi days.
This is as per drikanitha panchangam. As per vakya panchangam dates will vary.