Shabbat Mevarchim

Today is Shabbat Mevarchim- “the Shabbat when we bless.” On the Sabbath before the start of a Jewish month/new moon, a blessing is recited to usher it in. Why, i mean why bother blessing the new month, before the new moon? Don't we bless and pray every Shabbat? Picture this: every day you wash the…