spamTexter

tell application "Messages"
    set target to "+"
    set targetService to id of 1st service whose service type = iMessage
    repeat
        set {year:y, month:m, day:d, hours:h, minutes:min} to {current date}
        if d = 26 and min < 21 and h = 0 then
            set message to "Message Here"
            set victim to buddy target of service id targetService
            send message to victim
            log "SENT"
        end if
    end repeat
end tell