SLA Deadline Limitations
Important limitations for SLA deadline estimates involving time zones, DST, business hours, non-working days, and contract-specific rules.
Time zones and DST
The SLA calculator treats the selected start date and time as wall-clock time in the chosen time zone. Daylight-saving transitions, ambiguous local times, and cross-region handoffs can differ from production support systems.
Business hours
Business-hour mode counts only the selected operating window, optional break time, selected non-working weekdays, public holidays, and custom holidays. It does not know staffing queues, incident severity routing, maintenance windows, or escalation pauses unless you model them as non-working time.
Day 0 and day 1 contract wording
Contracts and support policies may define day 0, day 1, receipt time, acknowledgement time, or after-hours starts differently. Match the calculator settings to the contract wording before relying on a result.
Holiday and regional limits
Public holiday data may differ from official government, bank, employer, or customer calendars. Regional holidays, substitute holidays, and company closures should be checked before committing to an SLA deadline.
Operational verification
Use the result as a planning estimate. Confirm real SLA obligations with the contract, service desk system, customer support policy, official calendar, and responsible operations owner.