These stamps will be issued April 9th. From Israel Post:

“Over the years, the IDF has become more professionalized and developed more organizational specialties. One of the ways in which the military expresses its appreciation for this uniqueness and specialization is through different colored berets, allowing soldiers to demonstrate that they belong to a specific branch or unit. This trend, which began in the mid-1970’s, has gained momentum over the years, as the IDF has formed more and more special frameworks and we salute him in that stamp.”