Standards
IANA time zones vs UTC offsets: what is the difference?
UTC+1 is a number. Europe/Paris is a history, a rule set and a prediction for a particular place.
An offset answers one narrow question
A UTC offset tells you the difference between UTC and a local clock at a particular instant. It is excellent for displaying a finished conversion, but it carries no information about where the rule came from or when it may change.
An IANA identifier carries rules
An IANA identifier such as Europe/Paris or America/New_York identifies a representative location and its known civil-time transitions. It lets a program calculate the correct offset for a past or future date, including daylight saving time.
Store the place with the event
For a future meeting, record the local wall time, date and time-zone identifier. Do not store only the current offset. If the jurisdiction changes its clocks before the meeting, updated time-zone data can apply the revised rule.