Unless you plan on being awake at 1am on Sunday, I find it best to just carry on as normal & wake up as nature intended. As you note, smartphones click forward one hour, and you can change time on anything else the next day.
It is funny you mention headaches. I seem to remember headaches as we went from GMT to BST but not for a long time - possibly I don't look at it as an issue anymore.
Unless you plan on being awake at 1am on Sunday, I find it best to just carry on as normal & wake up as nature intended. As you note, smartphones click forward one hour, and you can change time on anything else the next day.
It is funny you mention headaches. I seem to remember headaches as we went from GMT to BST but not for a long time - possibly I don't look at it as an issue anymore.