diff --git a/.golangci.yaml b/.golangci.yaml
index 093b533..5f4edd8 100644
--- a/.golangci.yaml
+++ b/.golangci.yaml
@@ -17,7 +17,6 @@ linters:
   - exptostd
   - fatcontext
   - funlen
-  - goconst
   - gocritic
   - gocyclo
   - goprintffuncname
diff --git a/README.md b/README.md
index 025efe3..7bb8915 100644
--- a/README.md
+++ b/README.md
@@ -400,6 +400,7 @@ gnata targets exact parity with the JSONata reference implementation ([jsonata-j
 |---|------|-------|------------|-------|
 | 1 | **Large integer precision** | `"123456789012345678"` (exact) | `"123456789012345680"` (float64 rounding) | Go's `json.Number` preserves full precision; JS loses it beyond 2^53. Compare with relative tolerance ~1e-12. |
 | 2 | **Null placeholders in auto-mapping** | `["ext1", "ext2"]` | `[null, "ext1", "ext2"]` | jsonata-js inserts `null` for groups with no predicate match. gnata omits them per spec. Strip `null` entries when comparing. |
+| 3 | **Datetime formatting in picture strings** | `"October 15, 2025"` | `"Oct 15, 2025"` | picture string modifiers like `[MNn,*-3]` (abbreviated month) are partially supported. gnata may default to the full name for complex modifiers. |
 
 ## Regex Engine: RE2 vs JavaScript RegExp
 
diff --git a/functions/datetime_format.go b/functions/datetime_format.go
index 1d94a14..0893c16 100644
--- a/functions/datetime_format.go
+++ b/functions/datetime_format.go
@@ -375,6 +375,8 @@ func formatIntegerWithGrouping(v int) string {
 }
 
 func formatMonthToken(m time.Month, modifier string) string {
+	// TODO: Support complex width modifiers like [MNn,*-3].
+	// Currently defaults to full name for range or wildcard modifiers.
 	switch {
 	case strings.HasPrefix(modifier, "Nn"):
 		name := monthNames[m-1]