To wake up in the morning and to discover that live days upside-down, - a thing is more serious than "ground-hog Day"! Шестиклассник Gleb Елизаров just scratched on an ancient wall a date "23.05.2013" - and left with the pair of class-mates at first in Mays, 22, and then in 21, 20th, 19th.Recently passing to new school Gleb, high lout-achiever Юра Карасев and Helen Зюзина stuck in domestic businesses, see in the reiteration of yesterday's and позавчерашних events some pluses. It is possible to rewrite final control, to avoid a fight with a hooligan or even without the pricks of conscience to down all pocket-moneys on treating - in fact again it will be appeared the morning of note and coin in a purse!But than farther schoolchildren from Mays, 23, the weaker hope to come back in the future - and how to wipe inscription that will do only in a week? Excursion to the archaeological find allegedly related to civilization Maya, became beginning of adventure for three guys, the recital of that will convince not a single adult. Or however will there be that, who them will believe?Juvenile story "Calendar of ма (й) I" am debut work of Victoria Ледерман, at once winning success, : child's judge of competition the name of В. Крапивина awarded with her special prize (2014). An author shows masterly, as characters of boys and girl, derelicts and egoists change, under influence of general trouble. Fantastic episodes are folded in the real novel of education, enthralling and not becoming overgrown with edifying, and many details of life of heroes do the world of book acquainted and near to any teenager.