Here's some moon mail sent to Katerina. Tomorrow is this month's full moon - in north America it is referred to as the snow moon. So far this year we've been almost snow free with no significant snowfall.
One of the stamps she used was this one celebrating International Year of the Periodic Table of Elements. The United Nations chose 2019 to commemorate the 150th anniversary of Russian chemist Dmitri Ivanovich Mendeleev's first organization of the elements known at the time into a table in 1869. The highlighted elements Vanadium, Tungsten and Platinum were discovered by Spaniards.