ANSWER (from own knowledge of the Greek Code of Civil Procedure, ΚΠολΔ, as in force October 2026)

Step 1. Which time limit applies.
The judgment is a final judgment of the Multi-Member Court of First Instance under the ordinary procedure, so it is appealable (art. 511 ΚΠολΔ; appeal heard by the Court of Appeal, art. 19 ΚΠολΔ). The appellant is a company with its seat (έδρα) in Heraklion, i.e. in Greece, and so are the opposing parties as far as the case says. The appeal time limit is therefore 30 days (art. 518 par. 1 ΚΠολΔ). The 60-day limit applies only if the appellant or an opponent resides or is seated abroad or at an unknown address (art. 518 par. 1, second limb). It does not apply here.

Step 2. Starting event.
The 30 days run from the service of the judgment on the party (art. 518 par. 1 ΚΠολΔ: the limit starts from service). Service was made on Thursday 16 July 2026 at the plaintiff's initiative. The service is what starts the limit; the publication on 2 July 2026 does not. The alternative limit of three years from publication (art. 518 par. 2 ΚΠολΔ) applies only to a judgment that was never served. It does not apply here, because the judgment was served.

Step 3. Counting rule.
Time limits in days are counted under the Civil Code (art. 144 par. 1 ΚΠολΔ in conjunction with arts. 240-246 ΑΚ). The day on which the event occurs is not counted (art. 241 ΑΚ). Day 1 is therefore Friday 17 July 2026. The limit ends at the end of the last day (art. 242 ΑΚ). The time limit is not suspended or extended because of the judicial vacation (1 July to 15 September), so it runs through July and August.

Step 4. Day 30.
Day 1 = 17 July. Day 15 = 31 July. Day 30 = 15 August 2026 (31 July is day 15, then 15 more days in August).
Check: 16 July is a Thursday, so 13 August (28 days later) is a Thursday and 15 August 2026 is a Saturday.

Step 5. Last day falls on a Saturday and a public holiday.
15 August is the Dormition of the Mother of God, a public holiday, and in 2026 it falls on a Saturday. When the last day of a procedural time limit is a Saturday, a Sunday or a public holiday, the limit is extended to the next working day (art. 144 par. 3 ΚΠολΔ, in line with art. 243 ΑΚ). Sunday 16 August 2026 is also non-working. The next working day is Monday 17 August 2026.

Step 6. Filing.
The appeal is filed by lodging the appeal document with the clerk's office of the court that issued the judgment (art. 495 par. 1 and art. 511 ff. ΚΠολΔ, art. 518 par. 1) by the end of Monday 17 August 2026.

Conclusion: the last day for filing the appeal is Monday 17 August 2026 (30 days from service under art. 518 par. 1, counted under art. 144 par. 1 ΚΠολΔ and arts. 240-242 ΑΚ, extended from Saturday 15 August, a public holiday, under art. 144 par. 3 ΚΠολΔ and art. 243 ΑΚ).

RESULT: deadline = 2026-08-17; rule = art. 518 par. 1 ΚΠολΔ (30 days from service), with art. 144 ΚΠολΔ and arts. 240-243 ΑΚ for the counting and the extension
