I have worked for a large organisation for 2.5yrs. I have had so many team managers (if you average it out it works out at one every three months!). Some have not even started but resigned just after being introduced to the team, but before working with us. Not only that, I have changed team several times so now do not know my colleagues very well (just to smile at before we get going) as we are all busy on the phones (call centre). They seem nice but I don't know them.
It was a special birthday for me at the beginning of the month. Not a single card, e-mail, best wishes from anyone, not even my old team or my old team manager. I don't currently have a team manager as they are trying to recruit one, the previous one being in position for less than a week before he went off with stress and then resigned. It is not as if I was unpopular with my colleagues, as I joined in and was invited to several evenings outside work time.
I am really sad. I know it is no one's "fault" but my birthday was up on the wall in my old team area, was told to the team manager who resigned last week and went, and was not a state secret!