DateTime vs DateTimeOffset

dates.ipynb

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   "source": [
    "# Find difference between DateTime and DateTimeOffset\n"
   ]
  },
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    {
     "data": {
      "text/plain": "6/9/2021 10:24:39 PM - 6/9/2021 7:24:39 PM = 02:59:59.9999903\r\n"
     },
     "output_type": "unknown"
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    {
     "data": {
      "text/plain": "6/9/2021 10:24:39 PM +03:00 - 6/9/2021 7:24:39 PM +00:00 = -00:00:00.0000101\r\n"
     },
     "output_type": "unknown"
    }
   ],
   "source": [
    "using System;\n",
    "// Find difference between Date.Now and Date.UtcNow\n",
    "var date1 = DateTime.Now;\n",
    "var date2 = DateTime.UtcNow;\n",
    "var difference = date1 - date2;\n",
    "Console.WriteLine(\"{0} - {1} = {2}\", date1, date2, difference);\n",
    "\n",
    "// Find difference between Now and UtcNow using DateTimeOffset\n",
    "var dateOffset1 = DateTimeOffset.Now;\n",
    "var dateOffset2 = DateTimeOffset.UtcNow;\n",
    "difference = dateOffset1 - dateOffset2;\n",
    "Console.WriteLine(\"{0} - {1} = {2}\", dateOffset1, dateOffset2, difference);\n",
    "// If run in the Pacific Standard time zone on 4/2/2007, the example\n",
    "// displays the following output to the console:\n",
    "//    4/2/2007 7:23:57 PM - 4/3/2007 2:23:57 AM = -07:00:00\n",
    "//    4/2/2007 7:23:57 PM -07:00 - 4/3/2007 2:23:57 AM +00:00 = 00:00:00"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# DateTimeOffset\n"
   ]
  },
  {
   "cell_type": "code",
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   "metadata": {
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   "outputs": [
    {
     "data": {
      "text/plain": "datetimeoffset 6/2/2021 3:53:09 PM +03:00\r\n"
     },
     "output_type": "unknown"
    },
    {
     "data": {
      "text/plain": "Current culture: en-US\r\nModel-bound value is: 2021-06-02T15:53:09.5540940+03:00, Kind is: Local\r\nModel-bound converted to UTC time value is: 2021-06-02T12:53:09.5540940Z, Kind is: Utc\r\nParsed time value is: 2021-06-02T15:53:09.5540940+03:00, Kind is: Local\r\nParsed UTC time value is: 2021-06-02T12:53:09.5540940Z, Kind is: Utc"
     },
     "output_type": "unknown"
    }
   ],
   "source": [
    "using System;\n",
    "using System.Globalization;\n",
    "\n",
    "var rawTime = \"2021-06-02T15:53:09.554094+03:00\";\n",
    "var datetimeoffset = DateTimeOffset.Parse(rawTime);\n",
    "\n",
    "Console.WriteLine($\"datetimeoffset {datetimeoffset}\");\n",
    "\n",
    "var datetime = datetimeoffset.LocalDateTime;\n",
    "\n",
    "var result = $\"Current culture: {CultureInfo.CurrentCulture}\";\n",
    "\n",
    "// Format string \"O\" is ISO 8601 round-trippable https://docs.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings#Roundtrip\n",
    "result += $\"\\r\\nModel-bound value is: {datetime.ToString(\"O\")}, Kind is: {datetime.Kind}\";\n",
    "\n",
    "var utcTime = datetime.ToUniversalTime();\n",
    "result += $\"\\r\\nModel-bound converted to UTC time value is: {utcTime.ToString(\"O\")}, Kind is: {utcTime.Kind}\";\n",
    "\n",
    "var parsedTime = DateTime.Parse(rawTime);\n",
    "result += $\"\\r\\nParsed time value is: {parsedTime.ToString(\"O\")}, Kind is: {parsedTime.Kind}\";\n",
    "\n",
    "var parsedTimeUtc = DateTime.Parse(rawTime, CultureInfo.CurrentCulture, DateTimeStyles.AdjustToUniversal);\n",
    "result += $\"\\r\\nParsed UTC time value is: {parsedTimeUtc.ToString(\"O\")}, Kind is: {parsedTimeUtc.Kind}\";\n",
    "\n",
    "result\n",
    "\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# DateTime.UtcNow vs DateTime.Now"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "dotnet_interactive": {
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   "outputs": [
    {
     "data": {
      "text/plain": "timeUtcNow 6/9/2021 7:24:47 PM\r\n"
     },
     "output_type": "unknown"
    },
    {
     "data": {
      "text/plain": "timeUtcNow 2021-06-09T19:24:47.6292838Z\r\n"
     },
     "output_type": "unknown"
    },
    {
     "data": {
      "text/plain": "timeNow 6/9/2021 10:24:47 PM\r\n"
     },
     "output_type": "unknown"
    },
    {
     "data": {
      "text/plain": "timeNow 2021-06-09T22:24:47.6294755+03:00\r\n"
     },
     "output_type": "unknown"
    }
   ],
   "source": [
    "\n",
    "var timeUtcNow = DateTime.UtcNow;\n",
    "\n",
    "Console.WriteLine($\"timeUtcNow {timeUtcNow}\");\n",
    "Console.WriteLine($\"timeUtcNow {timeUtcNow.ToString(\"O\")}\");\n",
    "\n",
    "var timeNow = DateTime.Now;\n",
    "\n",
    "Console.WriteLine($\"timeNow {timeNow}\");\n",
    "Console.WriteLine($\"timeNow {timeNow.ToString(\"O\")}\");"
   ]
  },
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