Определите даты

object(ArrayObject)#853 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(48) "конспект урока по истории "
    ["seo_title"] => string(26) "konspiekt-uroka-po-istorii"
    ["file_id"] => string(6) "128897"
    ["category_seo"] => string(8) "istoriya"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1415604175"
  }
}

object(ArrayObject)#875 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(87) "Урок-викторина  «Путешествие в мир математики» "
    ["seo_title"] => string(48) "urok-viktorina-putieshiestviie-v-mir-matiematiki"
    ["file_id"] => string(6) "112236"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(12) "meropriyatia"
    ["date"] => string(10) "1408446965"
  }
}

object(ArrayObject)#853 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(38) "Презентация проекта "
    ["seo_title"] => string(24) "priezientatsiia-proiekta"
    ["file_id"] => string(6) "214703"
    ["category_seo"] => string(16) "nachalniyeKlassi"
    ["subcategory_seo"] => string(11) "presentacii"
    ["date"] => string(10) "1432430601"
  }
}

object(ArrayObject)#875 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(65) "Историческая дата на уроке истории "
    ["seo_title"] => string(38) "istorichieskaia-data-na-urokie-istorii"
    ["file_id"] => string(6) "162340"
    ["category_seo"] => string(8) "istoriya"
    ["subcategory_seo"] => string(7) "prochee"
    ["date"] => string(10) "1422348136"
  }
}

object(ArrayObject)#853 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(36) "Урок на тему "Семья" "
    ["seo_title"] => string(21) "urok-na-tiemu-siem-ia"
    ["file_id"] => string(6) "235982"
    ["category_seo"] => string(16) "nachalniyeKlassi"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1443903699"
  }
}