It's been ages since I've used any Irish, but I was hoping someone ould tell me the proper way to say "My day is now" or something along those lines...

Tá mo lá anois.

or

Taim lá anois.

Or am I completely wrong on both versions?

Go raibh maith agat.

The first translation looks right, but it looks like a word-for-word translation from English, and there may be a better way to say it.

The second one means "I am a day now" (with a grammar mistake and a long stroke missing)...

Some suggestions:

Mo lá-sa atá ann anois!

or

Tá mo lá tagtha

or

Anois mo lá

Funny, normally you should write mo lása (no hyphen) but it may be understood as "my lace" :-)

Or simply "inniu mo lá"...

Sin an fath gur chuir mé fleiscín isteach.
Níl fhios agam cad deir na bráithre sa chás seo.

Is maith liom "Inniu mo lá", tá sin níos gonta fós.

Deireann na Bráithre gur féidir fleiscín a dh’úsáid le athbhrí a sheachnadh, is é sin le ráidht, go dtig leat "do lá-sa" a scríobh, go díreach. :-)

Is liomsa an lá inniu,

b’fhéidir

Another nice way of saying the same thing: 'Is é mo lá fómhair é' (Today is the day I reap my reward, my lucky day). Gheobhaidh tú in FGB é faoin cheannfhocal 'fómhar'.

Sin go deas!

Sin ceann iontach, Antain.