HASS as Alarm Clock

Configuration
1

How can I use HASS as alarm clock that performs certain tasks and plays certain message on my mobile device at sunrise?

2

I don’t know what you mean by play messages (push or audio?) but you can create a simple automation with the sunrise as a trigger.

description: "Do things at sunrise"
mode: single
trigger:
  - platform: sun
    event: sunrise
    offset: 0
condition: []
action:
  - service: notify.notify
    metadata: {}
    data: {}
  - service: media_player.play_media
    metadata: {}
    data: {}

That should help you start. Import the code as yaml in an automation then switch back to visual.

A little extra:
If you want to send a push msg and play a custom sound:

service: notify.mobile_app_yadda
data:
  message: WAKE UP
  data:
    channel: alarm

Like this your phone (android idk about ios) has the option to set another ring tone in the setting for this category.

3

Thank you for the reply. Actually, it is audio message.

Before I try the automation you provided, how to make it trigger 30 minutes before sun rise?

4

Set to offset to -00:30:00.

5

So, I should use minus sign.
Speaking about audio output, how can i make it play text-to-speech on the device?

6

There are plenty of threads about that already on here.

7

Ok. I can manage that. Thanks.