diff --git a/src/locale/en-SG.js b/src/locale/en-sg.js
similarity index 98%
rename from src/locale/en-SG.js
rename to src/locale/en-sg.js
index a845024f7..36575d078 100644
--- a/src/locale/en-SG.js
+++ b/src/locale/en-sg.js
@@ -2,7 +2,7 @@
 import dayjs from 'dayjs'
 
 const locale = {
-  name: 'en-SG',
+  name: 'en-sg',
   weekdays: 'Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday'.split('_'),
   months: 'January_February_March_April_May_June_July_August_September_October_November_December'.split('_'),
   weekStart: 1,