I'm at the end of a 'mean solar day',
and I'm at the end of a 'sidereal day'.
I'm at the beginning of yesterday and yore,
but you cannot find me at the end of a month or anywhere in time.

What am I?

Answer
The letter 'Y'.

Good Morning Sprinkles. xx

Tuesdays riddle answer was - A Comb
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Yesterdays again in case you missed it

I have a head and I have a tail, but my eyes can never see my tail. What am I?
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Todays is:-

I'm at the end of a 'mean solar day',
and I'm at the end of a 'sidereal day'.
I'm at the beginning of yesterday and yore,
but you cannot find me at the end of a month or anywhere in time.

What am I?

All answers on my back wall please. xx

I have a head and I have a tail, but my eyes can never see my tail. What am I?

A Coin.