"سبتئذ" meaning in Arabic

{
  "forms": [
    {
      "form": "سَبْتَئِذٍ",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "sabtaʔiḏin",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "سَبْتَئِذٍ"
      },
      "expansion": "سَبْتَئِذٍ • (sabtaʔiḏin)",
      "name": "ar-adv"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Arabic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Arabic entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Arabic entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ar",
          "name": "Time",
          "orig": "ar:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "at that Saturday/Sabbath"
      ],
      "id": "en-سبتئذ-ar-adv-Nyl9woBE"
    }
  ],
  "word": "سبتئذ"
}

{
  "forms": [
    {
      "form": "سَبْتَئِذٍ",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "sabtaʔiḏin",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "سَبْتَئِذٍ"
      },
      "expansion": "سَبْتَئِذٍ • (sabtaʔiḏin)",
      "name": "ar-adv"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Arabic adverbs",
        "Arabic demonstrative adverbs",
        "Arabic entries with incorrect language header",
        "Arabic entries with language name categories using raw markup",
        "Arabic entries with topic categories using raw markup",
        "Arabic lemmas",
        "Arabic time adverbs",
        "ar:Time"
      ],
      "glosses": [
        "at that Saturday/Sabbath"
      ]
    }
  ],
  "word": "سبتئذ"
}