diff --git a/.github/Get-CalendarVersion.ps1 b/.github/Get-CalendarVersion.ps1
new file mode 100644
index 00000000..85ad22bd
--- /dev/null
+++ b/.github/Get-CalendarVersion.ps1
@@ -0,0 +1,50 @@
+#requires -version 7
+using namespace System.Management.Automation
+Set-StrictMode -Version 3
+$ErrorActionPreference = 'Stop'
+
+<#
+.SYNOPSIS
+Generates a CalendarVersion based on the current commit
+#>
+function Get-CalendarVersion {
+	param(
+		#The branch where releases are produced. Untagged releases will have the "beta" label
+		[string]$releaseBranchName = 'main',
+		#Add the build number to the release number. Basically replace the "+" with a "-"
+		[switch]$MergeBuild
+	)
+	$date = [DateTime]::Now
+	[string]$datePrefix = $date.Year, $date.Month -join '.'
+
+	#This version component is zero-based so it should be 0 for the first release of the month, 1 for the second, etc.
+	$releaseCount = @(& git tag -l "v$DatePrefix*").count
+
+	if ($releaseBranchName -eq [string](git describe --tags)) {
+		return [SemanticVersion]::new($date.Year, $date.Month, $releaseCount)
+	}
+
+	[string]$currentBranchName = & git branch --show-current
+	if (-not $currentBranchName -and $env:GITHUB_REF) {
+		$currentBranchName = $env:GITHUB_REF
+	}
+
+	Write-Verbose "Current Branch Name: $currentBranchName"
+
+	[string]$branchName = if ($currentBranchName -eq $releaseBranchName) {
+		'beta'
+	} elseif ($currentBranchName -match '^refs/pull/(\d+)/merge$') {
+		'pr' + $matches[1]
+		Write-Verbose "Pull Request Branch Detected, branchname is now pr$($matches[1])"
+	} else {
+		$currentBranchName.split('/') | Select-Object -Last 1
+	}
+
+	$delimiter = $MergeBuild ? '+' : '-'
+	[int]$commitsSince = @(& git log --oneline -- "$currentBranchName..HEAD").count
+	[string]$prereleaseTag = $branchName, $commitsSince.ToString().PadLeft(3, '0') -join $delimiter
+
+	return [SemanticVersion]::new($date.Year, $date.Month, $releaseCount, $prereleaseTag)
+}
+
+Get-CalendarVersion
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 52c1b676..60be3956 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,32 +30,30 @@ jobs:
         with:
           path: |
             node_modules
-            ~/.dotnet/tools
-            .git/gitversion_cache
-            .config/dotnet-tools.ci.json
           key: ${{ runner.os }}-node-${{ hashFiles('package-lock.json') }}
 
       - name: ➕ Dependencies
         if: steps.cache.outputs.cache-hit != 'true'
         run: |
           & npm ci
-          & dotnet tool install -g gitversion.tool --version 5.6.11
 
-      - name: 🔍 GitVersion
+      - name: 🔍 Get Calendar Version
         id: version
         run: |
-          $semanticVersion = & dotnet-gitversion /nofetch | ConvertFrom-Json | % SemVer
-          "Calculated Version: $semanticVersion"
-          "::set-output name=semanticVersion::$semanticVersion"
+          [string]$version = & .github\Get-CalendarVersion.ps1 -MergeBuild
+          "Calculated Version: $version"
+          "::set-output name=version::$version"
+          "::set-output name=calendarVersion::$version"
+          "::set-output name=semanticVersion::$version"
 
       - name: 👷‍♂️ Build
         run: |
-          npm run build ${{steps.version.outputs.semanticVersion}}
+          npm run build ${{steps.version.outputs.version}}
 
       - name: ⬆ Artifact
         uses: actions/upload-artifact@v2
         with:
-          name: vsix-${{steps.version.outputs.semanticVersion}}
+          name: vsix-${{steps.version.outputs.version}}
           path: '*.vsix'
 
       - name: 📝 Draft Github Release
@@ -64,5 +62,5 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          version: '${{steps.version.outputs.semanticVersion}}'
+          version: '${{steps.version.outputs.version}}'
           prerelease: true