azuredeploy.json

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "time": {
            "type": "string",
            "defaultValue": "[utcNow()]",
            "metadata": {
                "description": "This returns the current UTC time of deployment. This function may only be used in the defaultValue of a parameter."
            }
        },
        "date": {
            "type": "string",
            "defaultValue": "[utcNow('dd-MM-yy')]",
            "metadata": {
                "description": "Standard dateTime format strings are supported: https://docs.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings"
            }
        },
        "guid": {
            "type": "string",
            "defaultValue": "[newGuid()]",
            "metadata": {
                "description": "This will generate a new GUID each time this template is deployed. This function may only be used in the defaultValue of a parameter."
            }
        },
        "trulyUnique": {
            "type": "string",
            "defaultValue": "[uniqueString(newGuid())]",
            "metadata": {
                "description": "This will generate a new uniqueString() each time this template is deployed. This is not idempotent, use with care."
            }
        },
        "trulyUniqueGuid": {
            "type": "string",
            "defaultValue": "[guid(newGuid())]",
            "metadata": {
                "description": "This will generate a new guid each time this template is deployed. The guid() function can be idempotent, used this way it is not."
            }
        },        
        "monthlyUnique": {
            "type": "string",
            "defaultValue": "[uniqueString(utcNow('MM'))]",
            "metadata": {
                "description": "This will generate the same uniqueString() when it's deployed within the same month."
            }
        }
    },
    "resources": [],
    "outputs": {
        "time": {
            "type": "string",
            "value": "[parameters('time')]"
        },
        "date": {
            "type": "string",
            "value": "[parameters('date')]"
        },
        "guid": {
            "type": "string",
            "value": "[parameters('guid')]"
        },
        "trulyUnique": {
            "type": "string",
            "value": "[parameters('trulyUnique')]"
        },
        "trulyUniqueGuid": {
            "type": "string",
            "value": "[parameters('trulyUniqueGuid')]"
        },
        "fancy": {
            "type": "array",
            "value": "[split(parameters('time'), 'T')]"
        },
        "monthly": {
            "type": "string",
            "value": "[parameters('monthlyUnique')]"
        }
    }
}