The Office of the Registrar's quarter calendar — first/last day of classes and finals, the three registration passes, fee deadline and add/drop deadlines. The keystone contract of the estate: everything else is keyed on quarter. Published as Swagger 2.0, 4 paths, base https://api.ucsb.edu/academics.
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swagger: '2.0'
info:
version: v1
title: Academic Quarter Calendar
description: Quarter Calendar information from the Office of the Registrar.
x-source-url: https://developer.ucsb.edu/sites/default/files/openapi/quartercalendar-v1-api.ucsb_.edu_.yaml
x-last-validated: '2026-08-30'
x-operator: institution
host: api.ucsb.edu
basePath: /academics
schemes:
- https
securityDefinitions:
ucsb-api-key:
name: ucsb-api-key
in: header
type: apiKey
paths:
/quartercalendar/v1/quarters/current:
get:
tags:
- Quarters
operationId: /quartercalendar/v1/quarters/current
consumes: []
produces:
- application/json
- text/json
parameters:
- name: type
in: query
description: "This can be (default) 'firstdayofquarter',\r\n 'lastdayoffinals'."
required: false
type: string
default: ''
- name: ucsb-api-version
in: header
description: The requested API version
required: false
type: string
default: '1.0'
responses:
'200':
description: OK
schema:
$ref: '#/definitions/QuarterCalendar'
description: "Returns the current quarter. The criteria is today's date and the search <param name=\"\
type\" />.\r\nThe search type can be 'firstdayofquarter' (default), 'lastdayoffinals'.\r\nThis\
\ data is also available in a human readable format at\r\n([Data Dictionary - Quarter Calendar](https://dataservices.sa.ucsb.edu/_layouts/15/ReportServer/RSViewerPage.aspx?rv:RelativeReportUrl=/Lookup%20Tables/Quarter%20Calendar.rdl&Source=https%3A%2F%2Fdataservices%2Esa%2Eucsb%2Eedu%2FLookup%2520Tables%2FForms%2FAllItems%2Easpx))"
security:
- ucsb-api-key: []
/quartercalendar/v1/quarters:
get:
tags:
- Quarters
operationId: /quartercalendar/v1/quarters
consumes: []
produces:
- application/json
- text/json
parameters:
- name: quarter
in: query
description: A specific quarter. If this is used all other parameters are ignored.
required: false
type: string
default: ''
- name: date
in: query
description: A date within a quarter in format YYYYMMDD.
required: false
type: string
default: ''
- name: type
in: query
description: "Used with date parameter. This can be (default) 'firstdayofquarter' or\r\n \
\ 'lastdayoffinals'."
required: false
type: string
default: ''
- name: ucsb-api-version
in: header
description: The requested API version
required: false
type: string
default: '1.0'
responses:
'200':
description: OK
schema:
type: array
items:
$ref: '#/definitions/QuarterCalendar'
description: "Search for a listing of quarters that fit the criteria. All quarters can be returned\
\ or\r\na specific quarter. If the quarter parameter is used, all other parameters are ignored.\r\
\nThe date parameter can be used to filter the list down to a quarter that contains the\r\ngive\
\ date (YYYYMMDD format). On the date search the criteria for which date is compared\r\nagainst\
\ the search day can be 'firstdayofquarter' or 'lastdayoffinals'.\r\nThis data is also available\
\ in a human readable format at\r\n([Data Dictionary - Quarter Calendar](https://dataservices.sa.ucsb.edu/_layouts/15/ReportServer/RSViewerPage.aspx?rv:RelativeReportUrl=/Lookup%20Tables/Quarter%20Calendar.rdl&Source=https%3A%2F%2Fdataservices%2Esa%2Eucsb%2Eedu%2FLookup%2520Tables%2FForms%2FAllItems%2Easpx))"
security:
- ucsb-api-key: []
/quartercalendar/v1/sessions/current:
get:
tags:
- Sessions
operationId: /quartercalendar/v1/sessions/current
consumes: []
produces:
- application/json
- text/json
parameters:
- name: ucsb-api-version
in: header
description: The requested API version
required: false
type: string
default: '1.0'
responses:
'200':
description: OK
schema:
$ref: '#/definitions/SessionCalendar'
description: Get Session Information by quarter
security:
- ucsb-api-key: []
/quartercalendar/v1/sessions:
get:
tags:
- Sessions
operationId: /quartercalendar/v1/sessions
consumes: []
produces:
- application/json
- text/json
parameters:
- name: quarter
in: query
description: quarter
required: false
type: string
default: ''
- name: date
in: query
required: false
type: string
default: ''
- name: ucsb-api-version
in: header
description: The requested API version
required: false
type: string
default: '1.0'
responses:
'200':
description: OK
schema:
type: array
items:
$ref: '#/definitions/SessionCalendar'
description: Get Session Information by quarter
security:
- ucsb-api-key: []
definitions:
QuarterCalendar:
type: object
properties:
quarter:
type: string
qyy:
type: string
name:
type: string
category:
type: string
readOnly: true
academicYear:
type: string
readOnly: true
firstDayOfClasses:
format: date-time
type: string
lastDayOfClasses:
format: date-time
type: string
firstDayOfFinals:
format: date-time
type: string
lastDayOfFinals:
format: date-time
type: string
firstDayOfQuarter:
format: date-time
type: string
lastDayOfSchedule:
format: date-time
type: string
pass1Begin:
format: date-time
type: string
pass2Begin:
format: date-time
type: string
pass3Begin:
format: date-time
type: string
feeDeadline:
format: date-time
type: string
lastDayToAddUnderGrad:
format: date-time
type: string
lastDayToAddGrad:
format: date-time
type: string
lastDayThirdWeek:
format: date-time
type: string
SessionCalendar:
type: object
properties:
quarter:
type: string
sessionNumber:
type: string
firstDayOfClasses:
format: date-time
type: string
firstDayOfFinals:
format: date-time
type: string
lastDayOfClasses:
format: date-time
type: string
lastDayOfFinals:
format: date-time
type: string
lastDayToAddGrad:
format: date-time
type: string
lastDayToAddUnderGrad:
format: date-time
type: string
lastDayToCancel:
format: date-time
type: string
lastDayToDropGrad:
format: date-time
type: string
lastDayToDropUnderGrad:
format: date-time
type: string