Timezone for post/page publish time is always shown as "(IST)"

[Kevin]

@GainfulShrimp it’s an unfortunate side-effect of how we store and display timezones, without a location included with the timezone the display in the admin area can show a timezone that is correct but appears wrong. There’s more detail in this topic:

Incorrect timezone when scheduling a post

@Leoooob the problem is that we store a combined timezone so that the timezone list isn’t huuuge. In the case of (GMT +0:00) Dublin, Edinburgh, London we store the timezone as Europe/Dublin which is the same as GMT+1, or BST, as we’re currently in here. Unfortunately this has the unwanted side-effect of making the timezone display in the date/time picker show IST which is the abbreviation for Irish Standard Time. To be clear, the times are all correct so you can carry on as normal, the only thi…