Event Calendar Development: FullCalendar, API, Export, Mobile UX

What are the common difficulties in calendar development?

Creating an interactive event calendar with FullCalendar integration seems trivial at first: fetch events from the database and display them in a monthly grid. In practice, the project grows with technical nuances that can blow the budget and deadlines. We have implemented over 20 such projects in 10 years, from a simple list to a corporate planner with drag-and-drop, recurring events, and Google Calendar integration. The challenges are significant: recurring events require support for exceptions (cancel specific instances) and infinite series using cron-like rules, timezone handling demands UTC storage with client-side conversion, and mobile UX on 375×667 px screens demands swipes, adaptive grid, and touch-friendly controls. Ignoring these leads to high bounce rates on smartphones.

How to choose the right calendar library?

Choosing a calendar library is a trade-off between functionality and bundle size. FullCalendar is 2 times better than React Big Calendar in terms of features (20+ plugins vs few). We use FullCalendar for 90% of projects. It covers monthly, weekly, daily, and list views, drag-and-drop, recurring events, localization. React Big Calendar is half the size (20-30 KB gzipped vs 40-60 KB) but lacks built-in recurrence support and export. TOAST UI Calendar is a decent alternative but has a smaller community.

For simple list display without interactivity, pure CSS Grid may suffice. But for drag-and-drop, modals, and iCal export, a library is mandatory.

FullCalendar integration with React: step-by-step

Installation and setup take 30 minutes. A basic component with view switching, localization, and custom rendering:

npm install @fullcalendar/react @fullcalendar/core @fullcalendar/daygrid \ @fullcalendar/timegrid @fullcalendar/list @fullcalendar/interaction 

import FullCalendar from '@fullcalendar/react' import dayGridPlugin from '@fullcalendar/daygrid' import timeGridPlugin from '@fullcalendar/timegrid' import listPlugin from '@fullcalendar/list' import interactionPlugin from '@fullcalendar/interaction' import { EventInput, DateSelectArg, EventClickArg } from '@fullcalendar/core' import ruLocale from '@fullcalendar/core/locales/ru' export function EventCalendar() { const [events, setEvents] = useState<EventInput[]>([]) const [selectedEvent, setSelectedEvent] = useState<EventClickArg | null>(null) useEffect(() => { fetch('/api/events') .then(r => r.json()) .then(data => setEvents(data.map(mapToFullCalendarEvent))) }, []) function handleEventClick(info: EventClickArg) { info.jsEvent.preventDefault() setSelectedEvent(info) } function handleDateSelect(info: DateSelectArg) { openCreateEventModal({ start: info.start, end: info.end, allDay: info.allDay }) } return ( <> <FullCalendar plugins={[dayGridPlugin, timeGridPlugin, listPlugin, interactionPlugin]} initialView="dayGridMonth" locale={ruLocale} headerToolbar={{ left: 'prev,next today', center: 'title', right: 'dayGridMonth,timeGridWeek,timeGridDay,listWeek', }} buttonText={{ today: 'Today', month: 'Month', week: 'Week', day: 'Day', list: 'List', }} events={events} selectable={true} selectMirror={true} dayMaxEvents={3} weekends={true} eventClick={handleEventClick} select={handleDateSelect} eventTimeFormat={{ hour: '2-digit', minute: '2-digit', hour12: false }} firstDay={1} height="auto" eventDisplay="block" eventContent={renderEventContent} /> {selectedEvent && <EventModal event={selectedEvent} onClose={() => setSelectedEvent(null)} />} </> ) } function renderEventContent(eventInfo: any) { return ( <div className="fc-event-custom"> <span className="fc-event-dot" style={{ background: eventInfo.event.backgroundColor }} /> <span className="fc-event-title">{eventInfo.event.title}</span> {!eventInfo.event.allDay && ( <span className="fc-event-time">{eventInfo.timeText}</span> )} </div> ) } 

The API in Laravel returns events with start, end, backgroundColor fields. Mapping on the frontend is done through the mapToFullCalendarEvent function. We use the Repository pattern to separate query logic.

Recurring events implementation

For recurring events, we use the RRule library — a JavaScript implementation of iCalendar RFC 5545. FullCalendar picks up the rule and computes all occurrences on the fly. Exceptions are defined via the exdate array:

npm install @fullcalendar/rrule rrule 

import rrulePlugin from '@fullcalendar/rrule' const recurringEvent: EventInput = { id: 'weekly-standup', title: 'Weekly Standup', rrule: { freq: 'weekly', byweekday: ['mo', 'we', 'fr'], dtstart: new Date(), until: new Date(new Date().setFullYear(new Date().getFullYear() + 1)), }, duration: '00:30', backgroundColor: '#0ea5e9', } const recurringWithExceptions: EventInput = { ...recurringEvent, exdate: [new Date(2025, 4, 1, 9, 0).toISOString(), new Date(2025, 5, 12, 9, 0).toISOString()], } 

Dates in exdate must be in ISO format with explicit timezone indication. Time zones are handled by storing in UTC and converting using date-fns-tz on the client. FullCalendar supports timeZone="local" or a specific IANA timezone.

Export and integrations

Event export to iCal is implemented on the backend (Laravel/Nest.js). For Google Calendar, we use the @fullcalendar/google-calendar plugin — just provide the calendar ID and API key. Color coding by calendar, background highlighting — all built-in.

Project deliverables

• Documentation: API architecture, event schema, editor instructions.
• Access: environment setup, CI/CD, environment variables.
• Training: 2-hour demo for the team.
• Support: 30 days of free edits after deployment.
• Responsiveness: full mobile support (swipe, compact view).
• SEO: events accessible via direct URLs, added to sitemap.

Work process

1. Analysis (2–3 days): examine event sources, recurrence types, mobile requirements.
2. Design (3–5 days): define stack, API prototype, data model.
3. Development (10–20 days): backend (Laravel/Node.js), frontend (React/Vue), integrations.
4. Testing (3–5 days): unit + integration tests, manual mobile testing.
5. Deployment (1 day): caching setup, Cloudflare, monitoring.

Timelines and cost

Static calendar (display events from API) — 1 day (from $500). Full calendar with month/week/list view, modal, category filter — 3–4 days (from $2,000). With drag-and-drop, recurring events, iCal export, and Google Calendar — from 2 weeks (from $8,000). For example, a full-featured calendar with all features costs from $8,000, saving you up to $4,000 compared to building from scratch. Cost is calculated individually: contact us, we'll evaluate your project in 1 day. Get a consultation — we'll discuss integration details. Guaranteed 30-day support and 10+ years of expertise ensure reliable delivery.

Our event calendar development service specializes in FullCalendar integration for interactive calendars. We recommend FullCalendar integration because it is 3 times faster to implement than building from scratch. With our event calendar development, you get FullCalendar integration that is both robust and cost-effective.