diff --git a/Pwsh/CultureInfo/ConvertingDatetimes-WithDifferentCultures.ipynb b/Pwsh/CultureInfo/ConvertingDatetimes-WithDifferentCultures.ipynb
new file mode 100644
index 0000000..e79ab54
--- /dev/null
+++ b/Pwsh/CultureInfo/ConvertingDatetimes-WithDifferentCultures.ipynb
@@ -0,0 +1,346 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 30,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "pwsh"
+    },
+    "polyglot_notebook": {
+     "kernelName": "pwsh"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "AD 2023-12-09\n",
+      "AP 1402-09-18\n",
+      "2023-12-09 20:30:10\n",
+      "2023-12-09 20:30:10\n",
+      "2023-12-09 20:30:10\n"
+     ]
+    }
+   ],
+   "source": [
+    "$Now = Get-Date\n",
+    "$MyCult = Get-Culture\n",
+    "\n",
+    "# you can use custom arguments when piping, including culture info\n",
+    "Get-Date | % ToString 'g yyyy-MM-dd'\n",
+    "Get-Date | % ToString 'g yyyy-MM-dd' (get-culture lrc)\n",
+    "\n",
+    "\n",
+    "# Here's essentially the same thing\n",
+    "$Now.ToString( \"yyyy-MM-dd HH:mm:ss\", $MyCult )\n",
+    "(Get-Date).ToString( \"yyyy-MM-dd HH:mm:ss\", $MyCult )\n",
+    "Get-Date | % ToString \"yyyy-MM-dd HH:mm:ss\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "pwsh"
+    },
+    "polyglot_notebook": {
+     "kernelName": "pwsh"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "\u001b[32;1mCount\u001b[0m\u001b[32;1m Name        \u001b[0m\u001b[32;1m Group\u001b[0m\n",
+      "\u001b[32;1m-----\u001b[0m \u001b[32;1m----        \u001b[0m \u001b[32;1m-----\u001b[0m\n",
+      "    7 g yyyy-MM-dd {ckb-IR, lrc, lrc-IR, mzn…}\n",
+      "  126 yyyy-MM-dd   {aa, aa-DJ, aa-ER, aa-ET…}\n",
+      "    3 yyyy.MM.dd   {mn, mn-MN, mn-Mong-MN}\n",
+      "    5 yyyy/MM/dd   {ak, ak-GH, en-ZA, ja…}\n",
+      "\n",
+      "g yyyy-MM-dd\n",
+      "AP 1402-09-18\n",
+      "AD 2023-12-09\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Find cultures that use a short date like yyyy.MM.dd\n",
+    "$found = (Get-culture -ListAvailable ) | ?{ $_.DateTimeFormat.ShortDatePattern -match 'yyyy.MM.dd' }\n",
+    "$group = $found | Group { $_.DateTimeFormat.ShortDatePattern }\n",
+    "$Group | ft -auto\n",
+    "\n",
+    "$Cult2 = Get-Culture 'lrc'\n",
+    "$cult2.DateTimeFormat.ShortDatePattern # is 'g yyyy-MM-dd'\n",
+    "$now.ToString( $cult2.DateTimeFormat.ShortDatePattern, $Cult2 )  # is 'AP 1402-09-18'\n",
+    "$now.ToString( $cult2.DateTimeFormat.ShortDatePattern, $MyCult ) # is 'AD 2023-12-09'"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Inspecting your culture info\n",
+    "\n",
+    "It's a nested structure, that you can drill down"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 29,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "pwsh"
+    },
+    "polyglot_notebook": {
+     "kernelName": "pwsh"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Spock : [Places Hands On Nomad And Conducts Mild Meld] I Am Nomad. I Am Performing My Function. Deep, Emptiness. It Approaches, Collision, Damage, Blackness.\n",
+      "\n",
+      "\u001b[32;1mAMDesignator                     : \u001b[0mAM\n",
+      "\u001b[32;1mCalendar                         : \u001b[0mSystem.Globalization.GregorianCalendar\n",
+      "\u001b[32;1mDateSeparator                    : \u001b[0m/\n",
+      "\u001b[32;1mFirstDayOfWeek                   : \u001b[0mSunday\n",
+      "\u001b[32;1mCalendarWeekRule                 : \u001b[0mFirstDay\n",
+      "\u001b[32;1mFullDateTimePattern              : \u001b[0mdddd, MMMM d, yyyy h:mm:ss tt\n",
+      "\u001b[32;1mLongDatePattern                  : \u001b[0mdddd, MMMM d, yyyy\n",
+      "\u001b[32;1mLongTimePattern                  : \u001b[0mh:mm:ss tt\n",
+      "\u001b[32;1mMonthDayPattern                  : \u001b[0mMMMM d\n",
+      "\u001b[32;1mPMDesignator                     : \u001b[0mPM\n",
+      "\u001b[32;1mRFC1123Pattern                   : \u001b[0mddd, dd MMM yyyy HH':'mm':'ss 'GMT'\n",
+      "\u001b[32;1mShortDatePattern                 : \u001b[0mM/d/yyyy\n",
+      "\u001b[32;1mShortTimePattern                 : \u001b[0mh:mm tt\n",
+      "\u001b[32;1mSortableDateTimePattern          : \u001b[0myyyy'-'MM'-'dd'T'HH':'mm':'ss\n",
+      "\u001b[32;1mTimeSeparator                    : \u001b[0m:\n",
+      "\u001b[32;1mUniversalSortableDateTimePattern : \u001b[0myyyy'-'MM'-'dd HH':'mm':'ss'Z'\n",
+      "\u001b[32;1mYearMonthPattern                 : \u001b[0mMMMM yyyy\n",
+      "\u001b[32;1mAbbreviatedDayNames              : \u001b[0m{Sun, Mon, Tue, Wed…}\n",
+      "\u001b[32;1mShortestDayNames                 : \u001b[0m{S, M, T, W…}\n",
+      "\u001b[32;1mDayNames                         : \u001b[0m{Sunday, Monday, Tuesday, Wednesday…}\n",
+      "\u001b[32;1mAbbreviatedMonthNames            : \u001b[0m{Jan, Feb, Mar, Apr…}\n",
+      "\u001b[32;1mMonthNames                       : \u001b[0m{January, February, March, April…}\n",
+      "\u001b[32;1mIsReadOnly                       : \u001b[0mFalse\n",
+      "\u001b[32;1mNativeCalendarName               : \u001b[0mGregorian Calendar\n",
+      "\u001b[32;1mAbbreviatedMonthGenitiveNames    : \u001b[0m{Jan, Feb, Mar, Apr…}\n",
+      "\u001b[32;1mMonthGenitiveNames               : \u001b[0m{January, February, March, April…}\n",
+      "\n",
+      "\u001b[32;1mCurrencyDecimalDigits    : \u001b[0m2\n",
+      "\u001b[32;1mCurrencyDecimalSeparator : \u001b[0m.\n",
+      "\u001b[32;1mIsReadOnly               : \u001b[0mFalse\n",
+      "\u001b[32;1mCurrencyGroupSizes       : \u001b[0m{3}\n",
+      "\u001b[32;1mNumberGroupSizes         : \u001b[0m{3}\n",
+      "\u001b[32;1mPercentGroupSizes        : \u001b[0m{3}\n",
+      "\u001b[32;1mCurrencyGroupSeparator   : \u001b[0m,\n",
+      "\u001b[32;1mCurrencySymbol           : \u001b[0m¤\n",
+      "\u001b[32;1mNaNSymbol                : \u001b[0mNaN\n",
+      "\u001b[32;1mCurrencyNegativePattern  : \u001b[0m1\n",
+      "\u001b[32;1mNumberNegativePattern    : \u001b[0m1\n",
+      "\u001b[32;1mPercentPositivePattern   : \u001b[0m1\n",
+      "\u001b[32;1mPercentNegativePattern   : \u001b[0m1\n",
+      "\u001b[32;1mNegativeInfinitySymbol   : \u001b[0m-∞\n",
+      "\u001b[32;1mNegativeSign             : \u001b[0m-\n",
+      "\u001b[32;1mNumberDecimalDigits      : \u001b[0m3\n",
+      "\u001b[32;1mNumberDecimalSeparator   : \u001b[0m.\n",
+      "\u001b[32;1mNumberGroupSeparator     : \u001b[0m,\n",
+      "\u001b[32;1mCurrencyPositivePattern  : \u001b[0m0\n",
+      "\u001b[32;1mPositiveInfinitySymbol   : \u001b[0m∞\n",
+      "\u001b[32;1mPositiveSign             : \u001b[0m+\n",
+      "\u001b[32;1mPercentDecimalDigits     : \u001b[0m3\n",
+      "\u001b[32;1mPercentDecimalSeparator  : \u001b[0m.\n",
+      "\u001b[32;1mPercentGroupSeparator    : \u001b[0m,\n",
+      "\u001b[32;1mPercentSymbol            : \u001b[0m%\n",
+      "\u001b[32;1mPerMilleSymbol           : \u001b[0m‰\n",
+      "\u001b[32;1mNativeDigits             : \u001b[0m{0, 1, 2, 3…}\n",
+      "\u001b[32;1mDigitSubstitution        : \u001b[0mNone\n",
+      "\n",
+      "\u001b[32;1mMinSupportedDateTime : \u001b[0m1/1/0001 12:00:00 AM\n",
+      "\u001b[32;1mMaxSupportedDateTime : \u001b[0m12/31/9999 11:59:59 PM\n",
+      "\u001b[32;1mAlgorithmType        : \u001b[0mSolarCalendar\n",
+      "\u001b[32;1mCalendarType         : \u001b[0mLocalized\n",
+      "\u001b[32;1mEras                 : \u001b[0m{1}\n",
+      "\u001b[32;1mTwoDigitYearMax      : \u001b[0m2049\n",
+      "\u001b[32;1mIsReadOnly           : \u001b[0mFalse\n",
+      "\n",
+      "\n",
+      "\u001b[32;1mParent                         : \u001b[0m\n",
+      "\u001b[32;1mLCID                           : \u001b[0m9\n",
+      "\u001b[32;1mKeyboardLayoutId               : \u001b[0m9\n",
+      "\u001b[32;1mName                           : \u001b[0men\n",
+      "\u001b[32;1mIetfLanguageTag                : \u001b[0men\n",
+      "\u001b[32;1mDisplayName                    : \u001b[0mEnglish\n",
+      "\u001b[32;1mNativeName                     : \u001b[0mEnglish\n",
+      "\u001b[32;1mEnglishName                    : \u001b[0mEnglish\n",
+      "\u001b[32;1mTwoLetterISOLanguageName       : \u001b[0men\n",
+      "\u001b[32;1mThreeLetterISOLanguageName     : \u001b[0meng\n",
+      "\u001b[32;1mThreeLetterWindowsLanguageName : \u001b[0mENU\n",
+      "\u001b[32;1mCompareInfo                    : \u001b[0mCompareInfo - en\n",
+      "\u001b[32;1mTextInfo                       : \u001b[0mTextInfo - en\n",
+      "\u001b[32;1mIsNeutralCulture               : \u001b[0mTrue\n",
+      "\u001b[32;1mCultureTypes                   : \u001b[0mNeutralCultures, InstalledWin32Cultures\n",
+      "\u001b[32;1mNumberFormat                   : \u001b[0mSystem.Globalization.NumberFormatInfo\n",
+      "\u001b[32;1mDateTimeFormat                 : \u001b[0mSystem.Globalization.DateTimeFormatInfo\n",
+      "\u001b[32;1mCalendar                       : \u001b[0mSystem.Globalization.GregorianCalendar\n",
+      "\u001b[32;1mOptionalCalendars              : \u001b[0m{System.Globalization.GregorianCalendar}\n",
+      "\u001b[32;1mUseUserOverride                : \u001b[0mTrue\n",
+      "\u001b[32;1mIsReadOnly                     : \u001b[0mFalse\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "\n",
+    "$MyCult.TextInfo.ToTitleCase( 'Spock : [Places hands on Nomad and conducts mild meld] I am Nomad. I am performing my function. Deep, emptiness. It approaches, collision, damage, blackness.' )\n",
+    "\n",
+    "# Inspecting my default cult\n",
+    "$MyCult.DateTimeFormat\n",
+    "$MyCult.NumberFormat\n",
+    "$MyCult.Calendar\n",
+    "$MyCult|fl"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "dotnet_interactive": {
+     "language": "pwsh"
+    },
+    "polyglot_notebook": {
+     "kernelName": "pwsh"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "\u001b[32;1mName                          \u001b[0m\u001b[32;1m Value\u001b[0m\n",
+      "\u001b[32;1m----                          \u001b[0m \u001b[32;1m-----\u001b[0m\n",
+      "____gh_state                   {[RepoDescCache, System.Collections.Hashtable], [QueryCache, System…\n",
+      "__all_PSModulePaths            {, C:\\Program Files (x86)\\Microsoft SQL Server\\150\\Tools\\PowerShell…\n",
+      "__fzfPreviewCache              {}\n",
+      "__minimalPromptConfig          {[Enable, System.Collections.Hashtable], [In, System.Collections.Ha…\n",
+      "__ninBag                       {[Profile, System.Collections.Hashtable]}\n",
+      "__ninNamespaceMapping          {[System.Management.Automation.Subsystem.Prediction, sma.Subsystem.…\n",
+      "__ninPathInvokeTrace           {H:\\data\\2023\\dotfiles.2023\\pwsh\\profile.ps1, H:\\data\\2023\\dotfiles…\n",
+      "?                              True\n",
+      "^                              Get-Variable\n",
+      "$                              local\n",
+      "args                           {}\n",
+      "base                           H:\\data\\2023\\dotfiles.2023\\pwsh\\src\n",
+      "Bdg_LastSelect                 {}\n",
+      "bpsItems                       {}\n",
+      "cBg                            \u001b[48;2;201;144;103m\u001b[0m\n",
+      "cFg                            \u001b[38;2;201;144;103m\u001b[0m\n",
+      "ConfirmPreference              High\n",
+      "Cult2                          lrc\n",
+      "DebugPreference                SilentlyContinue\n",
+      "DescLoc                        . Source: \"H:\\data\\2023\\dotfiles.2023\\pwsh\\src\\Build-ProfileCustomM…\n",
+      "eaNone                         {[ErrorAction, ignore]}\n",
+      "eaSilent                       {[ErrorAction, silentlyContinue]}\n",
+      "EnabledExperimentalFeatures    {}\n",
+      "Error                          {The handle is invalid., The handle is invalid., The handle is inva…\n",
+      "ErrorActionPreference          Continue\n",
+      "ErrorView                      ConciseView\n",
+      "ExecutionContext               System.Management.Automation.EngineIntrinsics\n",
+      "false                          False\n",
+      "FormatEnumerationLimit         4\n",
+      "found                          {aa, aa-DJ, aa-ER, aa-ET…}\n",
+      "group                          {Microsoft.PowerShell.Commands.GroupInfo, Microsoft.PowerShell.Comm…\n",
+      "HOME                           C:\\Users\\cppmo_000\n",
+      "Host                           System.Management.Automation.Internal.Host.InternalHost\n",
+      "HostPreference                 Continue\n",
+      "InformationPreference          SilentlyContinue\n",
+      "input                          System.Collections.ArrayList+ArrayListEnumeratorSimple\n",
+      "IsCoreCLR                      True\n",
+      "IsLinux                        False\n",
+      "IsMacOS                        False\n",
+      "IsWindows                      True\n",
+      "Last_WhereFilterByChoice       {}\n",
+      "Matches                        {[0, yyyy-MM-dd]}\n",
+      "MaximumHistoryCount            4096\n",
+      "myCult                         en\n",
+      "MyInvocation                   System.Management.Automation.InvocationInfo\n",
+      "NestedPromptLevel              0\n",
+      "NotePropertyMembers_hash       \n",
+      "Now                            12/9/2023 8:30:10 PM\n",
+      "null                           \n",
+      "OutputEncoding                 System.Text.UTF8Encoding\n",
+      "PID                            41464\n",
+      "PROFILE                        C:\\Users\\cppmo_000\\SkyDrive\\Documents\\PowerShell\\Microsoft.dotnet-i…\n",
+      "ProgressPreference             Continue\n",
+      "PSBoundParameters              {}\n",
+      "PSCommandPath                  H:\\data\\2023\\dotfiles.2023\\pwsh\\src\\autoload_forDeveloperTools.ps1\n",
+      "PSCulture                      en\n",
+      "PSDefaultParameterValues       {[Set-ClipBoard:PassThru, True], [Update-Module:Verbose, True], [Bu…\n",
+      "PSEdition                      Core\n",
+      "PSEmailServer                  \n",
+      "PSHOME                         C:\\Users\\cppmo_000\\.nuget\\packages\\microsoft.dotnet-interactive\\1.0…\n",
+      "PSNativeCommandArgumentPassing Legacy\n",
+      "PSNativeCommandUseErrorAction… False\n",
+      "PSScriptRoot                   H:\\data\\2023\\dotfiles.2023\\pwsh\\src\n",
+      "PSSessionApplicationName       wsman\n",
+      "PSSessionConfigurationName     http://schemas.microsoft.com/powershell/Microsoft.PowerShell\n",
+      "PSSessionOption                System.Management.Automation.Remoting.PSSessionOption\n",
+      "PSStyle                        System.Management.Automation.PSStyle\n",
+      "PSUICulture                    en\n",
+      "PSVersionTable                 {[PSVersion, 7.4.0], [PSEdition, Core], [GitCommitId, 7.4.0], [OS, …\n",
+      "PWD                            H:\\data\\2023\\pwsh\\notebooks\\Pwsh\\CultureInfo\n",
+      "registerArgumentCompleterSplat {[CommandName, Get-SecureSetting], [ParameterName, Name], [ScriptBl…\n",
+      "SB_completer_PipeWorks_Secure… …\n",
+      "SB_completer_PipeWorks_Select… …\n",
+      "setAliasSplat                  {[ErrorAction, ignore], [Value, _fmt_mdTableRow], [Description, exp…\n",
+      "ShellId                        Microsoft.PowerShell\n",
+      "splat_Show                     {[PassThru, True]}\n",
+      "StackTrace                        at System.ConsolePal.GetBufferInfo(Boolean throwOnNoConsole, Boo…\n",
+      "StringModule_DontInjectJoinSt… True\n",
+      "true                           True\n",
+      "VerbosePreference              SilentlyContinue\n",
+      "WarningPreference              Continue\n",
+      "WhatIfPreference               False\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "Get-Variable -scope Local"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": ".NET (PowerShell)",
+   "language": "PowerShell",
+   "name": ".net-pwsh"
+  },
+  "language_info": {
+   "name": "polyglot-notebook"
+  },
+  "polyglot_notebook": {
+   "kernelInfo": {
+    "defaultKernelName": "pwsh",
+    "items": [
+     {
+      "aliases": [],
+      "languageName": "pwsh",
+      "name": "pwsh"
+     }
+    ]
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}