diff options
| -rw-r--r-- | std/datetime/mod.ts | 5 | ||||
| -rw-r--r-- | std/datetime/test.ts | 18 |
2 files changed, 12 insertions, 11 deletions
diff --git a/std/datetime/mod.ts b/std/datetime/mod.ts index 6bc947648..2afddbe6f 100644 --- a/std/datetime/mod.ts +++ b/std/datetime/mod.ts @@ -49,15 +49,16 @@ export function format(date: Date, formatString: string): string { export function dayOfYear(date: Date): number { // Values from 0 to 99 map to the years 1900 to 1999. All other values are the actual year. (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/Date) // Using setFullYear as a workaround + const yearStart = new Date(date); - yearStart.setFullYear(date.getFullYear(), 0, 0); + yearStart.setUTCFullYear(date.getUTCFullYear(), 0, 0); const diff = date.getTime() - yearStart.getTime() + (yearStart.getTimezoneOffset() - date.getTimezoneOffset()) * 60 * 1000; + return Math.floor(diff / DAY); } - /** * Get number of the week in the year (ISO-8601) * @return Number of the week in year diff --git a/std/datetime/test.ts b/std/datetime/test.ts index fb3d71705..10de786b6 100644 --- a/std/datetime/test.ts +++ b/std/datetime/test.ts @@ -160,15 +160,15 @@ Deno.test({ assertEquals(datetime.dayOfYear(new Date("-000001-04-01")), 91); assertEquals(datetime.dayOfYear(new Date("-000001-12-31")), 365); - // // 400 BC tests (leap-year) - assertEquals(datetime.dayOfYear(new Date("-00400-01-01")), 1); - assertEquals(datetime.dayOfYear(new Date("-00400-01-15")), 15); - assertEquals(datetime.dayOfYear(new Date("-00400-02-01")), 32); - assertEquals(datetime.dayOfYear(new Date("-00400-02-15")), 46); - assertEquals(datetime.dayOfYear(new Date("-00400-03-01")), 61); - assertEquals(datetime.dayOfYear(new Date("-00400-03-15")), 75); - assertEquals(datetime.dayOfYear(new Date("-00400-04-01")), 92); - assertEquals(datetime.dayOfYear(new Date("-00400-12-31")), 366); + // 400 BC tests (leap-year) + assertEquals(datetime.dayOfYear(new Date("-000400-01-01")), 1); + assertEquals(datetime.dayOfYear(new Date("-000400-01-15")), 15); + assertEquals(datetime.dayOfYear(new Date("-000400-02-01")), 32); + assertEquals(datetime.dayOfYear(new Date("-000400-02-15")), 46); + assertEquals(datetime.dayOfYear(new Date("-000400-03-01")), 61); + assertEquals(datetime.dayOfYear(new Date("-000400-03-15")), 75); + assertEquals(datetime.dayOfYear(new Date("-000400-04-01")), 92); + assertEquals(datetime.dayOfYear(new Date("-000400-12-31")), 366); // Special Cases |