updated jsdoc

index.ts

@@ -1,3 +1,9 @@
+/**
+ * Returns the day of the year.
+ * @param date - Date object.
+ * @param startAtZero - Whether the day of the year should be zero-based.
+ * @returns Day of year,
+ */
 export function getDayOfYear(date: Date, startAtZero = false): number {
   const year = date.getFullYear()
 
@@ -13,8 +19,8 @@ export function getDayOfYear(date: Date, startAtZero = false): number {
 /**
  * Returns a date string in the modern Julian format. (i.e. YYYYDDD)
  * ex. 2023-01-01 => '2023001'
- * @param date
- * @returns date string in modern Julian format
+ * @param date - Date object.
+ * @returns Date string in modern Julian format
  */
 export function toModernJulianDate(date: Date): string {
   const dayOfYear = getDayOfYear(date)
@@ -24,8 +30,8 @@ export function toModernJulianDate(date: Date): string {
 /**
  * Returns a date string in the modern Julian format with a two-digit year. (i.e. YYDDD)
  * ex. 2023-01-01 => '23001'
- * @param date
- * @returns date string in modern Julian format with a two-digit year
+ * @param date - Date object.
+ * @returns Date string in modern Julian format with a two-digit year
  */
 export function toShortModernJulianDate(date: Date): string {
   return toModernJulianDate(date).slice(2)