time zone test

* a day nowhere in particular
<2018-08-13 Mon>
* a universal day
:PROPERTIES:
:TIMEZONE: UTC
:END:
<2018-08-14 Tue>
* a day in Oslo
:PROPERTIES:
:TIMEZONE: Europe/Oslo
:END:
<2018-08-15 Wed>
* a day in Helsinki
:PROPERTIES:
:TIMEZONE: Europe/Helsinki
:END:
<2018-08-16 Thu>

* an appointment nowhere in particular
<2018-08-13 Mon 12:00>
* a universal appointment
:PROPERTIES:
:TIMEZONE: UTC
:END:
<2018-08-14 Tue 12:00>
* an appointment in Oslo
:PROPERTIES:
:TIMEZONE: Europe/Oslo
:END:
<2018-08-15 Wed 12:00>
* an appointment in Helsinki
:PROPERTIES:
:TIMEZONE: Europe/Helsinki
:END:
<2018-08-16 Thu 12:00>

* a long day in Oslo
:PROPERTIES:
:TIMEZONE: Europe/Oslo
:END:
<2018-08-17 Fri 08:00-21:00>

* a weekend in Zürich
:PROPERTIES:
:TIMEZONE: Europe/Zurich
:END:
<2018-08-18 Sat>--<2018-08-19 Sun>