docs: gmt info (#8002)

packages/noco-docs/docs/070.fields/040.field-types/060.formula/040.date-functions.md

@@ -128,7 +128,7 @@ DAY('2022-03-14 12:00:00') => 14
 ```
 
 #### Remark
-This function returns the day of the month as an integer between 1 and 31 (inclusive).
+This function returns the day of the month as an integer between 1 and 31 (inclusive). Note that the day information retrieved is based on the timezone of the server (GMT by default). If the browser timezone is different from the server timezone, the day value may differ.
 
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@@ -147,7 +147,7 @@ MONTH('2022-03-14 12:00:00') => 3
 ```
 
 #### Remark
-This function returns the month of the year as an integer between 1 and 12 (inclusive).
+This function returns the month of the year as an integer between 1 and 12 (inclusive). Note that the month information retrieved is based on the timezone of the server (GMT by default). If the browser timezone is different from the server timezone, the month value may differ.
 
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@@ -165,7 +165,7 @@ HOUR('2022-03-14 12:00:00') => 12
 ```
 
 #### Remark
-This function returns the hour of the day as an integer between 0 and 23 (inclusive).
+This function returns the hour of the day as an integer between 0 and 23 (inclusive). Hour information retrieved is based on a 24-hour clock & will be based on the timezone of the server (GMT by default). Note that, if browser timezone is different from the server timezone, the hour value may differ.
 
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