Especially when, for most of the year, even the US west coast doesn't use PST (they use PDT).
You may think I'm being pedantic, but most naive timezone conversion tools won't pick up this error for you, if you ask them to convert "1PM in PST to my local time". I once ended up on a conference call at the right time by myself because the other party assumed that London time was the same as UTC (it's not - they were in Daylight Saving Time, so they were an hour ahead).
Especially when, for most of the year, even the US west coast doesn't use PST (they use PDT).
You may think I'm being pedantic, but most naive timezone conversion tools won't pick up this error for you, if you ask them to convert "1PM in PST to my local time". I once ended up on a conference call at the right time by myself because the other party assumed that London time was the same as UTC (it's not - they were in Daylight Saving Time, so they were an hour ahead).