The festival of Michael and All Angels may be observed on Sunday 29 September or Monday 30 September.
If it is observed on Monday 30 September:

The Eighteenth Sunday after Trinity

https://almanac.oremus.org/2024-09-29

White

Proper 21
Sunday between 25 September and 1 October inclusive

Principal Service
Continuous
Esther 7.1-6, 9, 10; 9.20-22
Psalm 124
James 5.13-20
Mark 9.38-end

(or)
Related
Numbers 11.4-6, 10-16, 24-29
Psalm 19.7-14
James 5.13-20
Mark 9.38-end

Third Service
Psalm 122
Isaiah 48.12-end
Luke 11.37-end

Second Service
Psalms 120, 121
Exodus 24
Matthew 9.1-8

(or) Evening Prayer on the Eve of Michael and All Angels
Psalm 91
2 Kings 6.8-17
Matthew 18.1-6, 10

Collect

Almighty and everlasting God,
increase in us your gift of faith
that, forsaking what lies behind
and reaching out to that which is before,
we may run the way of your commandments
and win the crown of everlasting joy;
through Jesus Christ your Son our Lord,
who is alive and reigns with you,
in the unity of the Holy Spirit,
one God, now and for ever.

Post Communion

We praise and thank you, O Christ, for this sacred feast:
for here we receive you,
here the memory of your passion is renewed,
here our minds are filled with grace,
and here a pledge of future glory is given,
when we shall feast at that table where you reign
with all your saints for ever.

Additional Collect

God, our judge and saviour,
teach us to be open to your truth
and to trust in your love,
that we may live each day
with confidence in the salvation which is given
through Jesus Christ our Lord.

Collect on the Eve of Michael and All Angels

Everlasting God,
you have ordained and constituted
the ministries of angels and mortals in a wonderful order:
grant that as your holy angels always serve you in heaven,
so, at your command,
they may help and defend us on earth;
through Jesus Christ your Son our Lord,
who is alive and reigns with you,
in the unity of the Holy Spirit,
one God, now and for ever.

BCP Holy Communion

Deuteronomy 6.4-9
Psalm 122
1 Corinthians 1.4-8
Matthew 22.34-end

BCP Collect

Lord, we beseech thee, grant thy people grace to withstand the temptations of the world, the flesh, and the devil, and with pure hearts and minds to follow thee the only God; through Jesus Christ our Lord.