I think e I don't think non vengono mai usati da soli, ma vengono sempre seguiti da so, come nell'esempio, o da una proposizione come nel caso di I think/I don't think he went to the concert.
Celebrated on March 8 since 1946, Women's Day became in the 1970s a day for meetings, lectures and debates on women's issues. Less feminist in nature nowadays, it is the day on which women are traditionally given a present of a spray of mimosa.