diff --git a/src/util.ts b/src/util.ts
index fff08e5..74c0126 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -88,4 +88,11 @@ export function isEuropeanDST( date: Date ) {
 
   // Return true if within DST period
   return date >= start && date < end;
+}
+
+export function createQS (params: Record<string, string | number | boolean>): string {
+  const queryString = Object.entries(params)
+  .map(([key, value]) => `${encodeURIComponent(key)}=${encodeURIComponent(value)}`)
+  .join("&");
+  return queryString;
 }
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