4.4 timestamp (#1256)

Author: JPryce-Aklundh

modules/ROOT/pages/functions/index.adoc

@@ -140,6 +140,10 @@ These functions return a single value.
 | `startNode(input :: RELATIONSHIP?) :: (NODE?)`
 | Returns the start node of a relationship.
 
+1.1+| xref::functions/scalar.adoc#functions-timestamp[`timestamp()`]
+| `timestamp() :: (INTEGER?)`
+| Returns the difference, measured in milliseconds, between the current time and midnight, January 1, 1970 UTC.
+
 1.3+| xref::functions/scalar.adoc#functions-toboolean[`toBoolean()`]
 | `toBoolean(input :: STRING?) :: (BOOLEAN?)`
 | Converts a string value to a boolean value.

modules/ROOT/pages/functions/scalar.adoc

@@ -840,9 +840,7 @@ RETURN startNode(r)
 The function `timestamp()` returns the difference, measured in milliseconds, between the current time and midnight, January 1, 1970 UTC.
 
 [NOTE]
-====
-It is the equivalent of `datetime().epochMillis`.
-====
+`datetime.fromEpochMillis()` is a functional equivalent to `timestamp()`.
 
 *Syntax:*