when did patient 50065 receive direct antigen test for herpes simplex virus types 1 & 2 microbiology test the first time in 04/this year?
select microbiologyevents.charttime from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 50065 ) and microbiologyevents.spec_type_desc = 'direct antigen test for herpes simplex virus types 1 & 2' and datetime(microbiologyevents.charttime,'start of year') = datetime(current_time,'start of year','-0 year') and strftime('%m',microbiologyevents.charttime) = '04' order by microbiologyevents.charttime asc limit 1