Weekday of any date from year 1 to 9999 (Gregorian or Julian calendar) with day ...
https://calendar-systems.x402tookit.com/day-of-weekOverview
Weekday of any date from year 1 to 9999 (Gregorian or Julian calendar) with day of year, quarter, ISO week and ISO week-date.
Protocol
x402
Price
$0.02
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
Calendar Systems
Source
bazaar
Indexed
2026-10-20 21:22:32
Health
Status
healthy
Latency (p50)
513ms
Uptime (30d)
92.9%
Reliability Score
86.4/100
Last Checked
2026-10-28 06:43:12
Last Healthy
2026-10-28 06:43:12
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"date": "2026-10-11"
},
"type": "http"
}
Output Schema
{
"example": {
"asOf": "2026-10-11T08:54:32.594Z",
"calendar": "gregorian",
"date": "2026-10-11",
"dayOfYear": 284,
"daysInYear": 365,
"daysLeftInYear": 81,
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"gregorianDate": "2026-10-11",
"isoWeek": 41,
"isoWeekDate": "2026-W41-7",
"isoWeekYear": 2026,
"isoWeekdayNumber": 7,
"isoWeeksInThatYear": 53,
"julianCalendarDate": "2026-09-28",
"leapYear": false,
"monthName": "October",
"notChecked": [
"historical calendar adoption: pre-1582 Gregorian dates are proleptic and Julian-calendar weekdays are given only when you ask for calendar=julian",
"US/Sunday-first week numbering",
"…1 more"
],
"quarter": 4,
"reasons": [
"Weekday from the day count modulo 7.",
"ISO 8601: weeks start Monday; week 1 contains the year's first Thursday (the ISO week-year may differ from the calendar year near 1 January)."
],
"source": "Fixed-date arithmetic (Reingold and Dershowitz) and ISO 8601 week rules, computed locally",
"summary": "2026-10-11 (gregorian) is a Sunday: day 284 of 365, quarter 4, ISO week 2026-W41-7.",
"verdict": "COMPUTED",
"weekday": "Sunday"
},
"type": "json"
}