Yes I noticed that Poland celebrated International Women's on March 8th, but Mens day on 10th March, but international mens day on the 19th November is not celebrated, just like Malta used to celebrate their Mens day on the 7th February before they switched it to November 19th in line with other countries. Glad you mentioned Poland because I forgot to mention them with Malta above so in fact Poland are the only country who celebrates Mens day on a different date than other countries.