6.2 DateTime Tool

Quick Answer: The DateTime tool (Parse palette) transforms temporal data between unstructured text strings and Alteryx ISO-8601 standardized Date/DateTime formats (yyyy-MM-dd and yyyy-MM-dd hh:mm:ss), or vice versa. It operates in two modes: (1) String to Date/DateTime format (creates a native Date/DateTime field, converting invalid strings to Null with a log warning) and (2) Date/DateTime format to string (creates a custom formatted text string). Format specifiers are strictly case-sensitive: uppercase MM is Month, lowercase mm is Minute; uppercase HH is 24-hour, lowercase hh is 12-hour.

Date and time standardization is critical for accurate sorting, filtering, time-series calculations, and joins. Because source systems export dates in hundreds of regional and arbitrary text formats (e.g., "04/15/2026", "15-Apr-26", "April 15, 2026"), Alteryx enforces a strict internal storage standard: the ISO-8601 standard.

---

Tool Architecture & Standard Date Formats

The DateTime tool features 1 Input anchor (I) and 1 Output anchor (O). It does not modify incoming columns in place; instead, it appends a new output column containing the converted value.

+-----------------------------------------------------------------------------+
|                     ALTERYX NATIVE TEMPORAL DATA TYPES                      |
+-----------------------------------------------------------------------------+
|  Data Type   Length    Strict ISO Format           Example                  |
|  ---------   -------   ------------------------    -----------------------  |
|  Date        10 chars  yyyy-MM-dd                  2026-08-28               |
|  DateTime    19 chars  yyyy-MM-dd hh:mm:ss         2026-08-28 15:30:00      |
|  Time         8 chars  hh:mm:ss                    15:30:00                 |
+-----------------------------------------------------------------------------+

Core Principle: In Alteryx Designer, any field assigned the Date data type must follow the yyyy-MM-dd format. If you format a date as MM/dd/yyyy or dd-Mon-yy, that field cannot have a Date data type; it must be stored as a String (V_WString, String, etc.).

---

The Two Operational Modes

+-----------------------------------------------------------------------------+
|                         DATETIME TOOL CONFIGURATION                         |
+-----------------------------------------------------------------------------+
|  Select the format convert mode:                                            |
|  (*) String to Date/DateTime format                                         |
|  ( ) Date/DateTime format to string                                         |
|                                                                             |
|  1. Select the string field to convert:      [ Transaction_Date      |v]    |
|  2. Specify the new column name:             [ DateTime_Out            ]    |
|  3. Select the format that matches the incoming string field:               |
|     +--------------------------------------------------------------------+  |
|     | Custom                                                             |  |
|     | MM/dd/yyyy                                                         |  |
|     | yyyy-MM-dd                                                         |  |
|     | dd-Mon-yy                                                          |  |
|     | Month dd, yyyy                                                     |  |
|     +--------------------------------------------------------------------+  |
|     Custom Format: [ MM/dd/yyyy                                ]            |
|     Language:      [ English                                 |v]            |
+-----------------------------------------------------------------------------+

Mode 1: String to Date/DateTime Format (Parsing)

• Input: A string field containing text representations of dates (e.g., "10/31/2026").
• Output: A newly created column with data type Date (yyyy-MM-dd) or DateTime (yyyy-MM-dd hh:mm:ss).
• Mechanism: You tell Alteryx what format the incoming text string currently looks like so the engine can parse its components and convert it into standard ISO-8601.
• Error Behavior: If an incoming string cannot be parsed (e.g., "Invalid Date", "2026-02-30", or mismatched format pattern), Alteryx writes a Null value to the output field and logs a conversion error/warning in the Results Window messages tab. The workflow continues executing without crashing.

Mode 2: Date/DateTime Format to String (Formatting)

• Input: A native Date or DateTime field formatted in standard ISO-8601.
• Output: A new String column containing custom formatted text (e.g., "Sunday, October 31, 2026" or "31-Oct-26").
• Mechanism: You specify the desired target layout for downstream reporting, presentation dashboards, or external systems requiring non-standard date strings.

---

Case-Sensitive Format Specifiers Master Table

Understanding format specifier tokens is essential for the Core exam. The single most common mistake is confusing upper and lower case letters.

+-----------------------------------------------------------------------------+
|                 CRITICAL CASE-SENSITIVITY DISTINCTIONS                      |
+-----------------------------------------------------------------------------+
|   MM (Uppercase) = MONTH (01 - 12)    vs.   mm (Lowercase) = MINUTE (00 - 59)|
|   HH and hh are the SAME here: both mean the 24-HOUR clock (00 - 23)          |
|   DD is INVALID (Must use dd)         vs.   YY is INVALID (Must use yyyy/yy)|
+-----------------------------------------------------------------------------+

Exam Trap — HH and hh Are Not Opposites Here. In the DateTime tool's pattern-style format (dd, MM, yyyy), Alteryx documents HH or hh as "hours, with leading zeros for single-digit hours (24-hour clock)" — they behave identically, and pattern style has no English AM/PM designator at all. The 12-hour distinction exists only in the percent-style specifiers used by the DateTimeParse and DateTimeFormat functions, where %H is the 24-hour hour, %I is the 12-hour hour, and %p supplies AM or PM. Candidates who transfer the %H/%I rule onto HH/hh get these items wrong.

Exam Trap — Never Mix the Two Styles. The DateTime tool's Custom option accepts either pattern-style specifiers (dd, MM, yyyy) or percent-style specifiers (%d, %m, %Y), but Alteryx explicitly warns that you cannot mix them in one format. %B dd %Y is invalid; write it as Month dd yyyy or as %B %d %Y.

---

Custom Format Strings & Common Presets

When incoming strings do not match one of the built-in preset formats in the DateTime configuration window, selecting Custom allows you to construct arbitrary format patterns matching separators, punctuation, and layout:

+-----------------------------------------------------------------------------+
|                     CUSTOM FORMAT PARSING EXAMPLES                          |
+-----------------------------------------------------------------------------+
|  Incoming Raw Text String         Custom Format Pattern       Parsed ISO Date
|  ------------------------         ---------------------       ---------------
|  "08/28/2026"                     MM/dd/yyyy                  2026-08-28     
|  "28-Aug-2026"                    dd-Mon-yyyy                 2026-08-28     
|  "August 28, 2026"                Month dd, yyyy              2026-08-28     
|  "20260828"                       yyyyMMdd                    2026-08-28     
|  "28.08.26"                       dd.MM.yy                    2026-08-28     
|  "2026-08-28 15:30"               yyyy-MM-dd HH:mm             2026-08-28 15:30:00
+-----------------------------------------------------------------------------+

Exam Tip on Punctuation: Every literal separator, space, comma, dot, or hyphen present in the raw text string must be matched identically in the custom format pattern. If the raw string has a space after a comma ("August 28, 2026"), the format pattern must also include the space (Month dd, yyyy). Omitting the space causes the parse to fail and output Null.

---

Language Localization Settings

At the bottom of the DateTime Configuration Window, the Language drop-down allows you to specify the localization dictionary used for parsing and formatting month and day names:

• Supported Languages: English, French, German, Spanish, Portuguese, Italian, Japanese, Simplified Chinese, and more.
• Example: An incoming string "14-Février-2026" parsed with Language set to French and format dd-Month-yyyy successfully converts to 2026-02-14. If parsed with Language set to English, the parse fails and outputs Null.

---

High-Yield Exam Traps & Gotchas

• The Minute vs. Month Inversion Trap: Specifying yyyy-mm-dd instead of yyyy-MM-dd causes Alteryx to interpret the month digits as minutes! This is the most frequently tested syntax trap on the Core exam.
• Invalid Dates Produce Nulls (Not Errors): An unparseable date does not terminate the workflow or throw a fatal error. It generates a Null in the output field and logs a yellow warning in the Results log. downstream tools that do not handle Nulls may behave unexpectedly.
• 2-Digit Year Pivoting: When parsing two-digit years (yy), Alteryx uses a sliding century window based on the current system date (typically spanning from 1900 to 2099). For unambiguous long-term historical or future data, always use 4-digit years (yyyy).
• DateTime vs. Formula Functions: While the DateTime tool provides a point-and-click GUI for conversion, identical transformations can be accomplished in a Formula tool using functions like DateTimeParse([Field], "%m/%d/%Y") and DateTimeFormat([Field], "%B %d, %Y").