You have to question the conventional dates for those kings and the conventional dates for Christ first otherwise you will risk be using their wrong dates. I mean for example how do they/you get "538" bc for Cyrus, 445 bc for Artaxerxes, 26/30/33 ad for Christ? We should only use biblical dates with only additional info from external sources like Ptolemy Canon. I'll post what info from Bible I have for you below (from my chronology paper on academia.edu ). I agree it is difficult to know what the starting point is. I think one possible key is the first 7 weeks or 49 years. They might match between Cyrus and Darius, or Darius and Artaxerxes. Checkout Zechariah 1:1-12. Another theory I had was that the 70 weeks might be linked with Halley's Comet (76 yrs), but I am not sure about that.
Solomon to Zedekiah:
Jehoiakim 3rd/4th/5th = Nebuchdnezzar 1st/2nd (2 Ki 24, Jer 25, 36, 45, Dan 1-2). *
Jehoiakim 11 (incl 3 yrs) - Nebuchadnezzar 7/8 (2 Ki 23, 2 Chron 36, MT, Lxx, FJ, TA, SO).
Jehoiachin/Jeconiah/Joacim (8/18 yo) 3 months / 1 yr - Nebuchadnezzar II 7/8 (2 Ki 24, 2 Chron 36, 1 Esdr 1:44-5). *
Zedekiah 21 yo began/0/1 - Nebuchadnezzar II 7/8 (2 Ki 24, 2 Chron 36).
Zedekiah 4, Nebuchadnezzar 12
Jehoiachin 5 - Ezekiel 30 yo (Ezek 1).
Jehioachin 6th, 7th, 9th (Ezekiel).
Zedekiah 9 (2 Ki 25, Jer 39, 52). *
Jehoiachin 10th (Ezekiel)
Zedekiah 10 - Nebuchadnezzar 18 (Jer 32). *
Jehoiachin 11th (Ezekiel)
Zedekiah 11 - Nebuchadnezzar 19 (2 Ki 24-25, 2 Chron 36, Jer 1, 52, MT, Lxx, FJ, TA, SO).
Jehoicahin 12th (Ezekiel 33).
Exile/Captivity to Return/Rebuilding:
Jehoicahin 12th city struck (Ezekiel 33).
Gedeliah 2/7 months - Nebuchadnezzar (2 Ki 25, Jer 41)?
Nebuchadnezzar 23 (Jer 52). *
Nebuchadnezzar II 43 (FJ, Ptolemy).
Jehoiachin 25th yr = 14th yr after city struck (Ezek 40:1).
Jehoiachin 26 yrs (Gertoux)?
Jehoiachin 27th (Ezekiel)?
Jehoiachin 30th yr (Ezekiel 1)?
Jehoiachin 37 - Evilmerodach began/1 (2 Ki 25, Jer 52).
Evilmerodach 2 (Ptolemy).
30th yr aft ruin of city (2 Esdr 3:1-29, 9:44, 10:45).
Belshazar 1 (Dan 7).
Belshazar 3 (Dan 8).
Cyrus 1 decree (2 Chron 36, Ezra 1, 6, Dan 1, FJ, NBP). *
Cyrus 1st yr (2 Chr 36:22, Ez 1:1, 5:13; 6:3; Dan 1:21, 1 Esdr 2:1, 6:17-24).
Cyrus 2 (NBP).
Zerubbabel & Jeshua 2nd yr (Ez 3:8, 1 Esdr 5:56, 5:73).
Cyrus 3 (Dan 10).
Cyrus 9 (Ptolemy).
Cyrus ca 30 yrs.
Cambyses 8 (Ptolemy) or 7 or 6 (Manetho/JA) or 6 (FJ) or 3 (Manetho/EC).
Bardiya/Gaumata/Smerdis 7 months.
Magi 1 yr (Josephus).
Darius 62 yo (Dan 5).
Darius 1 (Dan 9, 11).
Cambyses 9 (Josephus) = Darius 2nd (Haggai).
Darius 2nd yr (4:24, Hag 1-2, Zech 1:1, 1 Esdr 2:30, 5:6, 6:1, Oxford).
Darius 4 (Zech 7).
Cyrus 46 = Darius 6 (Ezra 6, NBP, 1 Esdr 7:5). *
Darius 26 (NBP). *
Darius 6 + 26 yrs = 32 (NBP).
Darius 36 (Ptolemy, Manetho).
Ahasuerus/Xerxes 3 (Esth 1).
Ahasuerus/Xerxes 7 (Esth 2).
Ahasuerus/Xerxes 12 (Esth 3).
Ahasuerus/Xerxes 20/21 (Ptolemy, Manetho).
Artabanus 7 months.
Artaxerxes 2nd yr (Esth 11:2).
Artaxerxes 7th yr Ezra goes to Jerusalem (Ezra 7:7, 1 Esdr 8:6). *
Artaxerxes I 20 decree (Neh 1-2, 5) + 12 yrs (Neh 5) = 32 (Neh 5, 13).
Artaxerxes 30th yr (13:6).
Exile/Captivity to Return/Rebuilding:
Josiah 13 to Jehoiakim 4 = 23 yrs (Jer 25).
Nebuchadnezzar 7 yrs (Jer 52, Dan 4). *
Nebuchadnezzar to Cyrus (( + 4 =) 7 + =) 7 decades / 70 yrs (Rice).
Captivity 4 (Jer 28)? 5 (Ezek 1), 6 (Ezek 8), 7 (Ezek 20), 9 (Ezek 24), 10 (Ezek 29), 11 (Ezek 26, 30-31), 12 (Ezek 26, 32-33), 25 (Ezek 40), 27 - Tyre - Nebuchadnezzar (Ezek 27, 29).
Exile/Captivity of Egypt 40 yrs (Ezek 29:11).
Exile/Captivity 50 yrs (conventional, Wiki).
Exile/capitivity to return/2nd temple: 52/70 (SOR Jewish).
Temple destroyed to rebuilding commandment 7 weeks or 49 yrs (Brumlow).
Zedekiah or Jehoiachin or Jehoiakim to end of Exile/Captivity 70 yrs (2 Chron 36, Jer 25, 29, Daniel 9, Zech 1, MT, Lxx, FJ, TA, SO).
Cyrus 1/2 to Darius 32 is 70 yrs (NBP) or 71/72 (SB from NBP).
Exile/Captivity 70 yrs / many yrs / 7 gens (2 Chr 36:21, Dan 9:2, 1:12, 7:5, 1 Esdr 1:58, 25:11, Ep Jer 6:3).
Exile to return to rebuilding city 70 yrs to Cyrus' 1st + (46 - 2 + 26 =) 70 yrs Cyrus' 2nd to Darius' 32nd (NBP).
Captivity/Hoshea to Cyrus/Return 182.5 (FJ).
Captivity/Cyrus/Zerubbabel to Alexander/Malachi 189 yrs (Oxford).
Return/Rebuilding to Christ:
Alexander 3 yrs (FJ).
Alexander 12 yrs (1 Mac 1:7).
Ptolemy & Cleopatra 4th yr (Esth 11:1).
many yrs (1 Mac 1:9).
Kingdom of Greeks 137th yr Antiochus (1 Mac 1:10).
143rd yr (1 Mac 1:20).
2 yrs (1 Mac 1:29).
145th yr (1 Mac 1:54).
146th yr (1 Mac 2:70).
1 yr (1 Mac 3:28).
147th yr (1 Mac 3:37).
1 yr (1 Mac 4:28).
148th yr (1 Mac 4:52, 2 Mac 11:21-38).
149th yr (1 Mac 6:16, 2 Mac 13:1).
3.
150th yr (1 Mac 6:20).
1 yr (1 Mac 6:49).
7th yr (1 Mac 6:53).
151st yr (1 Mac 7:1, 2 Mac 14:4).
152nd yr (1 Mac 9:3).
153rd yr (1 Mac 9:54).
2 yrs (1 Mac 9:57).
160th yr (1 Mac 10:1-21).
162nd yr (1 Mac 10:57).
165th yr (1 Mac 10:67).
167th yr (1 Mac 11:19).
169th yr (2 Mac 1:7).
170th yr (1 Mac 13:41).
1st yr Simon (1 Mac 13:42).
171st yr (1 Mac 13:51).
172nd yr (1 Mac 14:1-27).
3rd yr Simon (1 Mac 14:27).
174th yr (1 Mac 15:10).
177th yr (1 Mac 16:14).
Kingdom of Greeks 188th yr (2 Mac 1:10).
many yrs (2 Mac 1:20).
3 yrs (2 Mac 4:23).
Eleazar 90 yrs old (2 Mac 6:24).
3 yrs (2 Mac 7:27, 2 Mac 14:1).
2 yrs (2 Mac 10:3).
Alexandra 9 yrs (FJ).
Anna x yrs + 7 yrs + 84 yrs (Luke 2:36).
Herod 5 yrs (FJ).
Herod 13 + = 14 + = 17 + = 36 yrs (Josepus/Oxford).
Temple to Jesus 46 yrs (John 2:20).
Aristobulus 16 yo.
Jesus 2 yrs old (Matt 2:16).
Jesus 10/11 yo + = 12 yo + = 45/46 yo + = 48 yo + = 50 yo (Palmer).
Jesus 12 yrs old (Luke 2:42).
Jesus ca 30 yo (= Tiberius 15) (Luke 3:1, 23, Rice).
Christ to Cross 33 yrs.
Jesus: "his generation".
Jesus not yet 50 yrs old (John 8:57).
Archelaus to departure from Babylon 32 (FJ).
Return/Rebuilding to Christ:
Medo-Persia/Return 538 bc (SDA? MT?)
Persia 558-330 bc (Armstrong).
Cyrus 540 bc (Rice).
Cyrus 536 bc (Jeffrey).
Cyrus to Alexander 32 yrs (Jewish, Oxford)
Cyrus to Alexander 52 yrs (Jewish, Oxford)
Cyrus/Zerubbabel to Alexander/Malachi 189 yrs (Oxford).
Cyrus to Alexander 200 yrs (Oxford).
Cyrus to Alexander 253 (FJ).
374 yrs (+ 164, Cyrus to rededication).
Return to Christ 420 (SOR Jewish).
490 yrs 511-21 bc (Testament of Levi, Thierring).
516 or 536 return to Christ (Oxford).
Darius to Christ 899 minus 351 (Jerome).
Darius to Jesus 548 (HB).
Decree to rebuild Jerusalem to Messiah/Christ: (7 x 7 yrs =) 49/50 yrs + (62 x 7 yrs =) 434 yrs = (69 x 7 =) 483 yrs + (1 x 7 =) 7 = (70 x 7 =) 490 (Daniel 9, MT, SDA, Brumlow).
rebuilding - Christ 62 weeks = (406 bc + ad 29) 434 yrs (JW).
return/rebuilding (455 bce + 29) = 483 yrs or 69 wks (JW).
(454 bc + ad 30 =) 69 weeks (Mithrandir).
Rebuilding to Jesus 69 weeks or (458/457 bc + ad 27) 483 yrs (SDA).
(408 bc + 33 =) 434 + 7 yrs or 62 + 1 wks (SDA).
70 weeks = ( + 70 =) 490 yrs (Brumlow).
(458/457 + 33 =) 490 yrs (Rice).
Rebuilding to Christ 70 weeks (Dan) linked with Halley's Comet (76 yrs) (SB)?
445 bc (Rice).
400 yrs 421 bc to 21 bc (Thierring)
420 yrs 421 bc to 1 bc (Thierring)
Greece/Macedon 333-330 bc (Armstrong).
Alexander to Judas Maccabeus 170 (FJ).
Alexander the Great ascends to Jesus born 309 years.
Alexander ascends to Archelaus succeeded 312 yrs.
Alexander ascends to crucifiction of Christ 341 + 1 = 342 yrs.
Ptolemaic period to Christ 300 bc.
312/311 yrs bc Grecian Seleucids to Christ.
143rd yr from 312 bc = 169 bc (Maccabees).
rededication to Christ 164 bc.
Judas Maccabeus to Alexandra 82 (FJ).
188 yrs ('Maccabees').
Alexandra to Antigonus 32 (FJ).
Attalus 133 bc (Hislop).
31 bc (Armstrong).
Anna 7 yrs married + 84 yrs widow.
Antigonus to Herod's Temple 18 (FJ).
Augustus ascends to Cyrenius 37 yrs (Josephus).
Augustus ascends to Jesus born/first 42 yrs (ASC, Exiguus) or 44 yrs.
Caesar (Augustus?) ascends to Herod dies 44 yrs.
Augustus ascends to Archelaus succeeded 45 yrs.
Augustus reigned 56 yrs lived 75 yrs.
Augustus reigned 57 yrs (14 yrs with Antony) & died 77 yo (FJ).
Herod dies 1 bc (Rice).
Herod ascends to Tiberias built 7 yrs.
Herod's Temple to Alexander & Aristobulus 12 (FJ).
Herod ascends to Temple built 15/17/18 yrs.
Herod/temple to Archelaus 12 (+ ...?) + 14 yrs (Josephus).
Herod ascends to Jesus born 32 yrs.
Herod reigned 34 yrs, lived in his city 70 yrs.
Herod 13 + = 14 + = 17 + = 36 yrs (Josephus, Oxford).
Herod's Temple building 46 yrs (John 2).
Cyrinus send & population counted to Jesus born & first year 1 year.
John conceived/born to Jesus conceived/born 6 months (Luke).
John Baptist 3 bc (Rice).
Alexander & Aristobulus to Archelaus 14 (FJ).
Jesus 15 bce, 12 bce babies slaughtered, 4 bce, 2 bce, 30/31 ce, 34 ce (Palmer based on FJ).
Jesus born 2 bc - ad 29-33 (Rice).
Christ 2 bce, 29 ce, 33 ce (JW).
Start of Jesus ministry 27 ad (SDA).
Christ 30 ad (Mithrandir).
Crucifixion 31 ad (SDA).
Jesus died 33 ad (Brumlow).
Jesus 2 yo, 4 yo, 12 yo, ca 30 yo, 1-3 yrs ministry (half week in Daniel?), “his generation", "not yet 50" (John).
Jesus might have lived anwhere from 31 to 49 yrs (SB based on Matthew, Luke, John)?
Archelaus to departure from Babylon 32 (FJ).
Archelaus 9 yrs.
Annanias/Hannan to Caiphas less than 4 years (Eusebius).
Quake in Tiberius' 1st year.
Tiberius ascends to Herod built Tiberias 7 yrs.
Tiberius ascends to Pilate sent to Jews 14 yrs.
Tiberius ascends to Jesus about thirty yo 15 yrs.
Tiberius ascends to Jesus crucified 17 + 1 = 19 yrs.
(Return to) Christ:
Herod's reign 47/44/41/40/38/37-4/1 bc or 3 ad (ASC).
Augustus Caesar 44/43/42-31/30/28/27/19 bc – 14 ad.
Cenus 30 bc (Egypt),
Census 28 bc (Suetonius, RGDA),
Census 27 bc (Gaul).
Herod's Temple built ca 21/20/19/early 17 bc.
Temple quarry date 19 bc.
Saturninus consul 19 bc, consul 11 bc, 9-7/6 bc (Tertullian), consul 4 bc, “3/2 bc”? 4-6 ad (Tertullian), 19-21 ad (Tertullian).
Jesus life sometime in the 60 years between the 19 bc and 39 ad (SB).
17 bce comet?
Star of Bethlehem candidates between 17 bc & 9 ad.
15 bc Agrippa visits Jerusalem and offers hecatomb in temple.
Cyrenius/Quirinus 14 bc (Cyrene), 12 bc (consul), 12/11-2/1 bc or 10-7 bc or 5-3 bc or 4-1 bc, 6/7-11/12 ad.
Quin(c)tilius 13 bc consul, 7/6-4/3 bc Syria, Varus 6-3 bc?, 8 ad consul.
12/11/9 bc Halley’s comet 56/63 days China (Dio Cassius RH 54:29)?
Census 12 bc (Gaul),
Census of Herod 12 bc?
Cenus 12/11 bc (Dio Cassius)?
9 bc conjunction Uranus & Saturn?
eclipse 9 bc?
Cenus 9 bc (Egypt),
Cenus 9/8/7 bc (of Roman empire/citizens, Res Gestae Divi Augusti, Censorinus, Josephus 16:6:1-8, Tertullian, Ancyra, Suetonius).
7/6 bc/bce conjunction of (Mars &) Jupiter & Saturn (3 x in Pisces) 5 months?
Cenus 7 bc (Cyrene),
Cenus 7/6 bc (maybe, not recorded)?
6 bc conjunction (Sun &) Jupiter & Moon & Saturn in Aries (Ven & Mars in neighbouring constellations).
6 bc conjunction Uranus & Venus?
6 bc double occultation of Jupiter by Moon close to sun in Aries?
5 bc object/tailed-comet/nova (70 days, China/Korea)?
4 bc comet with no tail that didn’t move (Korean)?
ca 4 bc comet & conjunction several planets in Pisces (DSS)? *
4 bc lunar eclipse?
Herod Archelaus 4 bc or 3 ad – 6 ad (Matthew, ASC).
3 bc conjunction of Venus & Saturn (in eastern sky)?
Mass oath in 3 bc.
3 bc conjunction of Jupiter & Venus in Leo?
3 bc conjunction Venus & Mercury?
Cenus 3 bc (mass oath, Josephus 17:41-45, pater patriae 2 bc).
3-2 bc 7 conjunctions Jupiter & Regulus?
3-2 bc conjunction of Jupiter & Regulus in Leo (1st of 3 x over 8 mo)?
2 bc conjunction of Jupiter & Venus near Regulus in Leo in (West at) sunset?
2 bc Venus rose to mark sceptre in Leo?
2 bc Jupiter stationary.
1 bc Jupiter & Venus in Virgo in sw?
eclipse 1 bc?
1 ad Venus rose in Aries?
Jesus born 1 ad.
Cenus 6/7 ad (Quirinus).
Annas/Hannan 6-15.
9 ad comets (Dio Cassius).
Eclipse 10 ad?
11 ad ban on astrology,
Cenus 13/14 (RGDA, Suetonius).
Census Augustus & Tiberius 13/14 ad, 18, 21, 31.
Lysanias 14-29/42 ad?
Annas' son 16-17.
17 earthquake Anatolia.
19 Jewish astrologers expelled from Rome.
Cenus 20.
23 ad Chinese astronomer.
eclipse 26 ad?
Jesus about thirty yo & Tiberius' fifteenth year ca 27/28/29/30 ad (SB)?
eclipse 29 ad?
32 ad darkness/eclipse (Thallus/Africanus).
33 ad "eclipse/blood-moon"?
Crucifixion 33 ad (ASC).
Census 33/34 ad.