Changes in the schedule of postage stamps in the II quarter of 2021

28.04.2021
Changes in the schedule of postage stamps in the II quarter of 2021
At the request of the administrations of Lviv and Mykolayiv astronomical observatories, the issue of postage stamps
"Astronomical Observatory of Lviv National University. I. Franko. 250 years since its foundation" and "Mykolayiv Astronomical Observatory.
200 years since its foundation" are postponed to September this year.