> For the complete documentation index, see [llms.txt](https://docs.coupler.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coupler.io/functionality/preview-data/adding-formula-based-custom-columns/parameters-for-datetime_format-formula.md). # Parameters for DATETIME\_FORMAT formula Reference guide for DATETIME\_FORMAT formula parameters in Coupler.io. Format date and time values in your custom columns using supported pattern syntax. DATETIME\_FORMAT formula presents a datetime value in a specified manner. There are different parameters that can be used to present your DATETIME data field into a preferred format by modifying the highlighted part of the formula:\ `datetime_format({arg},'`**`specified output format`**`')`

Output format	Formula example	Output expected result	Output example
M	$DATETIME_FORMAT({arg1},'M')$	Month of the year, cardinal nos. 1-12	1 2 ... 11 12
MM	$DATETIME_FORMAT({arg},'MM')$	Month of the year, cardinal nos. 01-12	01 02 ... 11 12
MMM	$DATETIME_FORMAT({arg},'MMM')$	Month name, three-letter abbreviation	Jan Feb ... Nov Dec
MMMM	$DATETIME_FORMAT({arg},'MMMM')$	Month name	January ... December
Q	$DATETIME_FORMAT({arg},'Q')$	Quarter of the year, cardinal nos. 1-4	1 2 3
D	$DATETIME_FORMAT({arg},'D')$	Day of the month, cardinal nos. 1-31	1 2 ... 30 31
Do	$DATETIME_FORMAT({arg},'Do')$	Day of the month, ordinal nos. 1st-31st	1st 2nd ... 30th 31st
DD	$DATETIME_FORMAT({arg},'DD')$	Day of the month, cardinal nos. 01-31	01 02 ... 30 31
d	$DATETIME_FORMAT({arg},'d')$	Day of the week, cardinal nos. 0-6	0 1 ... 5 6
dd	$DATETIME_FORMAT({arg},'dd')$	Day of the week, two-letter abbreviation	Su Mo ... Fr Sa
ddd	$DATETIME_FORMAT({arg},'ddd')$	Day of the week, three-letter abbreviation	Sun Mon ... Fri Sat
dddd	$DATETIME_FORMAT({arg},'dddd')$	Day of the week	Sunday ... Saturday
w	$DATETIME_FORMAT({arg},'w')$	Week of the year, cardinal nos. 1-53	1 2 ... 52 53
ww	$DATETIME_FORMAT({arg},'ww')$	Week of the year, cardinal nos. 01-53	01 02 ... 52 53
WW	$DATETIME_FORMAT({arg},'WW')$	Week of the year (ISO), cardinal nos. 01-53	01 02 ... 52 53
YY	$DATETIME_FORMAT({arg},'YY')$	Year, last two digits	00 01 ... 98 99
YYYY	$DATETIME_FORMAT({arg},'YYYY')$	Year	2000 2001 ... 2098 2099
GGGG	$DATETIME_FORMAT({arg},'GGGG')$	Week year (ISO)	2000 2001 ... 2098 2099
A	$DATETIME_FORMAT({arg},'A')$	Ante meridiem/post meridiem (majuscule)	AM PM
a	$DATETIME_FORMAT({arg},'a')$	Ante meridiem/post meridiem (miniscule)	am pm
H	$DATETIME_FORMAT({arg},'H')$	Hour, using a 24-hour clock from 0-23	0 1 ... 22 23
HH	$DATETIME_FORMAT({arg},'HH')$	Hour, using a 24-hour clock from 00-23	00 01 ... 22 23
h	$DATETIME_FORMAT({arg},'h')$	Hour, using a 12-hour clock from 1-12	1 2 ... 11 12
hh	$DATETIME_FORMAT({arg},'hh')$	Hour, using a 12-hour clock from 01-12	01 02 ... 11 12
m	$DATETIME_FORMAT({arg},'m')$	Minute	0 1 ... 58 59
mm	$DATETIME_FORMAT({arg},'mm')$	Minute	00 01 ... 58 59
s	$DATETIME_FORMAT({arg},'s')$	Second	0 1 ... 58 59
ss	$DATETIME_FORMAT({arg},'ss')$	Second	00 01 ... 58 59
SSS	$DATETIME_FORMAT({arg},'SSS')$	Fractional second	000 001 ... 998 999
Z	$DATETIME_FORMAT({arg},'Z')$	Time zone relative to GMT, inc. colons	-07:00 -06:00 ... +06:00 +07:00
ZZ	$DATETIME_FORMAT({arg},'ZZ')$	Time zone relative to GMT, not inc. colons	-0700 -0600 ... +0600 +0700
X	$DATETIME_FORMAT({arg},'X')$	Unix timestamp	1360013296

{% hint style="info" %} **Notes:** * The formula supports various combinations of format specifiers: * For example, 1991-08-24T15:12:52.567Z value of Datetime-formatted cell can be used in a following formula DATETIME\_FORMAT({**date**},'**Do** *of* **MMMM, YYYY**') to generate a result of "**24th** *of* **August***,* **1991**". {% endhint %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.coupler.io/functionality/preview-data/adding-formula-based-custom-columns/parameters-for-datetime_format-formula.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.