n8n-workflows/workflows/JIegnKLVXTkkTzfO_Daylight_Saving_Time_Notification.json

{
  "id": "JIegnKLVXTkkTzfO",
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  "name": "Daylight Saving Time Notification",
  "tags": [],
  "nodes": [
    {
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      "name": "When clicking ‘Test workflow’",
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        "content": "## How it works\n- check list of timezones\n- check if any timezone switches from/to Daylight Saving Time\n- notify on Slack\n\n## Remember to set up\n- Add timezones to \"Timezones List\"\n- Slack notification channel\n"
      },
      "typeVersion": 1
    },
    {
      "id": "0f4369fc-80b6-4fd6-8533-4aacbf4c9c65",
      "name": "Timezones List",
      "type": "n8n-nodes-base.code",
      "position": [
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      ],
      "parameters": {
        "jsCode": "return [\n\t{\n      timezone : \"America/New_York\"\n\t},\n\t{\n      timezone : \"Europe/Warsaw\"\n\t},\n];"
      },
      "typeVersion": 2
    },
    {
      "id": "3c1e6cd7-3812-4670-a53f-7270e29574f9",
      "name": "Calculate Zone Date and Time",
      "type": "n8n-nodes-base.set",
      "position": [
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      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "4e9f973f-a11f-474b-89ce-dac4a77a7c68",
              "name": "datetime_zone",
              "type": "string",
              "value": "={{ $now.setZone( $json.timezone ) }}"
            }
          ]
        },
        "includeOtherFields": true
      },
      "typeVersion": 3.4
    },
    {
      "id": "7f49ac42-afcb-4552-84da-180bc65b84b0",
      "name": "Check If Daylight Saving Time",
      "type": "n8n-nodes-base.set",
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      ],
      "parameters": {
        "options": {},
        "assignments": {
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              "id": "4e9f973f-a11f-474b-89ce-dac4a77a7c68",
              "name": "datetime_zone_dst",
              "type": "string",
              "value": "={{ $json.datetime_zone.toDateTime().setZone($json.timezone).isInDST }}"
            },
            {
              "id": "ff13ee6d-c146-4dcb-98c4-6cb9b2474b1d",
              "name": "datetime_zone_tomorrow_dst",
              "type": "string",
              "value": "={{ $json.datetime_zone_tomorrow.toDateTime().setZone($json.timezone).isInDST }}"
            }
          ]
        },
        "includeOtherFields": true
      },
      "typeVersion": 3.4
    },
    {
      "id": "f3596b52-03af-4a07-be04-a7300fc7b239",
      "name": "Check If Change Tomorrow",
      "type": "n8n-nodes-base.if",
      "position": [
        240,
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      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "loose"
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          "combinator": "and",
          "conditions": [
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              "operator": {
                "type": "boolean",
                "operation": "notEquals"
              },
              "leftValue": "={{ $json.datetime_zone_dst }}",
              "rightValue": "={{ $json.datetime_zone_tomorrow_dst }}"
            }
          ]
        },
        "looseTypeValidation": true
      },
      "typeVersion": 2.2
    },
    {
      "id": "612e2e06-0283-4acd-8d85-cba16acb7126",
      "name": "Send Notification On Upcoming Change",
      "type": "n8n-nodes-base.slack",
      "position": [
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      ],
      "webhookId": "871515be-56fc-4de7-835b-119d394fea47",
      "parameters": {
        "text": "=Tomorrow is Daylight Saving Time change in zone {{ $json.timezone }} - remember to adjust meeting times!",
        "select": "channel",
        "channelId": {
          "__rl": true,
          "mode": "list",
          "value": ""
        },
        "otherOptions": {},
        "authentication": "oAuth2"
      },
      "credentials": {
        "slackOAuth2Api": {
          "id": "B0jUtT53pVAEPaQM",
          "name": "Slack Oauth"
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      "typeVersion": 2.3
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      "name": "Calculate Tomorrow's Date",
      "type": "n8n-nodes-base.dateTime",
      "position": [
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        0
      ],
      "parameters": {
        "options": {
          "includeInputFields": true
        },
        "duration": 1,
        "magnitude": "={{ $json.datetime_zone }}",
        "operation": "addToDate",
        "outputFieldName": "datetime_zone_tomorrow"
      },
      "typeVersion": 2
    },
    {
      "id": "5ae0aa75-515d-4025-901e-82693f697436",
      "name": "Schedule Trigger",
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      "parameters": {
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      "webhookId": "40cc0fc1-c135-44fc-b3cb-dfec6fc1ce75",
      "parameters": {
        "text": "=Tomorrow is Daylight Saving Time change in zone {{ $json.timezone }} - remember to adjust meeting times!",
        "options": {},
        "subject": "DST change tomorrow in {{ $json.timezone }}",
        "emailFormat": "text"
      },
      "credentials": {
        "smtp": {
          "id": "tkdzDgcUAt04af3B",
          "name": "SMTP account"
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  "active": false,
  "pinData": {},
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  "connections": {
    "Timezones List": {
      "main": [
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            "node": "Calculate Zone Date and Time",
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      ]
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            "node": "Timezones List",
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    "Check If Change Tomorrow": {
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            "node": "Send Notification On Upcoming Change",
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            "node": "Send Email On Upcoming Change",
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            "node": "Check If Daylight Saving Time",
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    },
    "When clicking ‘Test workflow’": {
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            "node": "Timezones List",
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          }
        ]
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    }
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}