diff --git a/powershell/calendartest.ps1 b/powershell/calendartest.ps1
new file mode 100644
index 0000000..aedd4b4
--- /dev/null
+++ b/powershell/calendartest.ps1
@@ -0,0 +1,137 @@
+<# #>
+
+[array]$mos = Write-Output  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
+$mos
+
+$year = [System.Collections.ArrayList]@()::new
+$Jan = [System.Collections.ArrayList]@()::new
+$Feb = [System.Collections.ArrayList]@()::new
+$Mar = [System.Collections.ArrayList]@()::new
+$Apr = [System.Collections.ArrayList]@()::new
+$May = [System.Collections.ArrayList]@()::new
+$Jun = [System.Collections.ArrayList]@()::new
+$Jul = [System.Collections.ArrayList]@()::new
+$Aug = [System.Collections.ArrayList]@()::new
+$Sep = [System.Collections.ArrayList]@()::new
+$Oct = [System.Collections.ArrayList]@()::new
+$Nov = [System.Collections.ArrayList]@()::new
+$Dec = [System.Collections.ArrayList]@()::new
+
+cd
+
+$Jan = ( import-csv 2023-Jan.csv )
+$Feb = ( import-csv 2023-Feb.csv )
+$Mar = ( import-csv 2023-Mar.csv )
+$Apr = ( import-csv 2023-Apr.csv )
+$May = ( import-csv 2023-May.csv )
+$Jun = ( import-csv 2023-Jun.csv )
+$Jul = ( import-csv 2023-Jul.csv )
+$Aug = ( import-csv 2023-Aug.csv )
+$Sep = ( import-csv 2023-Sep.csv )
+$Oct = ( import-csv 2023-Oct.csv )
+$Nov = ( import-csv 2023-Nov.csv )
+$Dec = ( import-csv 2023-Dec.csv )
+
+$output = @() # THIS BREAKS if we use [System.Collections.ArrayList]@()::new
+
+# REF: https://stackoverflow.com/questions/20340525/evaluate-a-variable-within-a-variable-in-powershell
+#"eval" DayDetails = $Jan (put all the Jan data in)
+
+foreach ($thismo in $mos) {
+#    $thismo # DEBUGG
+    $tmpobj = [PSCustomObject]@{
+
+    # xxx TODO comment as needed - output fields for csv
+                    'Month'                = $thismo
+                    'DayDetails'            = $(Get-Variable -Name $thismo -ValueOnly)
+    } # customobj
+
+    $output += $tmpobj
+
+} # foreach
+
+$output
+Write-Host ""
+$output |where-object { $_.DayDetails -match 'Fr=13' } |select-object -Property Month,{$_.daydetails.Fr}
+
+Write-Host ""
+$output |where-object { $_.DayDetails -match 'Fr=13' } |select-object -Property Month,{$_.daydetails.Fr[1]}
+
+<#
+Month $_.daydetails.Fr[1]
+----- -------------------
+Jan   13
+Oct   13
+#>
+
+#$output.daydetails |where-object Fr -eq 13 
+
+<#
+Su : 8
+Mo : 9
+Tu : 10
+We : 11
+Th : 12
+Fr : 13
+Sa : 14
+
+Su : 8
+Mo : 9
+Tu : 10
+We : 11
+Th : 12
+Fr : 13
+Sa : 14
+
+$output |oss |select-string Fr=13
+
+Jan   {@{Su=1; Mo=2; Tu=3; We=4; Th=5; Fr=6; Sa=7}, @{Su=8; Mo=9; Tu=10; We=11; Th=12; Fr=13; Sa=14}, 
+@{Su=15;…
+Oct   {@{Su=1; Mo=2; Tu=3; We=4; Th=5; Fr=6; Sa=7}, @{Su=8; Mo=9; Tu=10; We=11; Th=12; Fr=13; Sa=14},
+@{Su=15;…
+
+
+$output |where-object { $_.DayDetails -match 'Fr=13' }    
+
+Month DayDetails
+----- ----------
+Jan   {@{Su=1; Mo=2; Tu=3; We=4; Th=5; Fr=6; Sa=7}, @{Su=8; Mo=9; Tu=10; We=11; Th=12; Fr=13; Sa=14}, @{Su=15… 
+Oct   {@{Su=1; Mo=2; Tu=3; We=4; Th=5; Fr=6; Sa=7}, @{Su=8; Mo=9; Tu=10; We=11; Th=12; Fr=13; Sa=14}, @{Su=15… 
+
+
+$output |where-object { $_.DayDetails -match 'Fr=13' } |select Month
+
+Month
+-----
+Jan
+Oct
+
+
+$output |where-object { $_.DayDetails -match 'Fr=13' } |select-object -Property Month,{$_.daydetails.Fr}
+
+Month $_.daydetails.Fr
+----- ----------------
+Jan   {6, 13, 20, 27…}
+Oct   {6, 13, 20, 27…}
+
+
+$output.daydetails.Fr |where-object { $_ -match 13 }
+13
+13
+
+#>
+
+<#
+$Jan = ( get-content 2023-Jan.csv )
+$Feb = ( get-content 2023-Feb.csv )
+$Mar = ( get-content 2023-Mar.csv )
+$Apr = ( get-content 2023-Apr.csv )
+$May = ( get-content 2023-May.csv )
+$Jun = ( get-content 2023-Jun.csv )
+$Jul = ( get-content 2023-Jul.csv )
+$Aug = ( get-content 2023-Aug.csv )
+$Sep = ( get-content 2023-Sep.csv )
+$Oct = ( get-content 2023-Oct.csv )
+$Nov = ( get-content 2023-Nov.csv )
+$Dec = ( get-content 2023-Dec.csv )
+#>
\ No newline at end of file