UTC+1 (GMT+1) is the current time zone in the U.K.
UTC+2 (GMT+2) is the current time zone in central Europe.
UTC+3 (GMT+3) is the current time zone in eastern Europe.
So, you’re still confusing me.
I’m going to assume that you know [I][B]where[/B][/I] you live (eastern Europe), but you don’t know [I][B]the time zone[/B][/I] that you’re in (GMT+3). So, let’s use the times you mentioned in your post, together with [I][B]the correct time zone[/B][/I] for your location, to figure out what your two brokers — one in Indonesia, and one in Australia — are doing when they open their trading platforms on Sunday.
Your Indonesian broker opens at 11:01pm EEST (Eastern European Summer Time = GMT+3). [I][B]This corresponds to 8am in New Zealand, where a new week is beginning (for business, banking, and retail forex trading).[/B][/I]
You can check my math on this, as follows: Currently the time zone in New Zealand is NZST (New Zealand Standard Time = GMT+12). Your time zone is GMT+3. The difference between these two time zones is 9 hours (with New Zealand [I][B]ahead[/B][/I] of eastern Europe by 9 hours). So, 11pm in eastern Europe + 9 hours = 8am in New Zealand.
Your Australian broker opens one hour later than your Indonesian broker. That is, your Australian broker opens at 12:01am your time (GMT+3), which corresponds to 9am in New Zealand and 7am in southeastern Australia (where the big financial centers are located).
Retail forex brokers are free to set whatever hours of operation they choose. If it annoys you that they don’t all choose to open for the week at exactly the same time, you should talk to them about this.
The worldwide foreign exchange market rolls on 24 hours per day, 365 days per year, regardless of what retail forex brokers do. This worldwide market (of which retail spot forex is a tiny fraction) is relatively quiet over the weekend, but not totally inactive. Currency transactions which you don’t see (because your brokers are closed for the weekend) can move prices over the weekend, and these weekend transactions produce the opening gaps we sometimes see when retail brokers open for the week.
If you have the [I][B]mistaken[/B][/I] impression that retail brokers in New Zealand open when the business day begins in New Zealand, and retail brokers in Australia open when the business day begins in Australia, and retail brokers in Japan open when the business day begins in Japan, etc., etc. — then, let me try to set you straight.
[I][B]All retail forex brokers around the world[/B][/I] open for the week at [I][B]about[/B][/I] 8am Monday morning New Zealand time, and close for the week at [I][B]about[/B][/I] 5pm Friday afternoon New York time. As you have discovered, there are slight variations in these times, from broker to broker.
In your previous post on this thread, you asked —
At least one retail forex broker that I am aware of remains open all weekend for retail traders like us, albeit with spreads that are much larger than usual. There may be [I][B]some[/B][/I] retail demand for that sort of broker service, but apparently not enough to entice all the other brokers to follow suit.
For most retail forex brokers, the hours of operation discussed above serve the retail trading community just fine.