Time comparisons are most reliable when they use a named regional time zone and a specific date, because UTC offsets can change.
Start with the participants’ cities
Use named cities or IANA time zones rather than abbreviations. Abbreviations such as CST can refer to more than one region and may be misunderstood.
Use the actual meeting date
Time differences can change with daylight saving. Convert the proposed time using the intended calendar date rather than assuming today’s difference will still apply.
Protect normal waking hours
Write down each participant’s local window, including working hours and personal limits. Look for overlap, rotate inconvenient slots for recurring meetings, and state the date and zone in every invitation.
WhatTimeHere formats times with your browser’s current IANA time-zone information. Device settings and software updates can affect the result, so confirm critical travel or operational times with an authoritative local source.