You could use R and the seq() function to do this
knime.out ← as.data.frame(seq(as.Date(“2019/10/01”), as.Date(“2019/10/31”), “days”))
names(knime.out)[1] ← “list_days”knime.out$list_days ← as.character(knime.out$list_days)
kn_example_sequence_days_in_month.knwf (13.5 KB)
edit: Extended version that also determines the first and last day of current month: