MySQL 5.5

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CREATE TABLE IF NOT EXISTS `myTable` (
  `id` int AUTO_INCREMENT,
  `name` varchar(30),
  `datetime` datetime,
  PRIMARY KEY (`id`)
) DEFAULT CHARSET=utf8;
INSERT INTO myTable SET name = 'name_1', datetime = '2020-5-14 17:54';
INSERT INTO myTable SET name = 'name_2', datetime = '2020-9-26 18:30';
INSERT INTO myTable SET name = 'name_3', datetime = '2020-4-16 22:59';
INSERT INTO myTable SET name = 'name_4', datetime = '2020-9-28 10:41';
INSERT INTO myTable SET name = 'name_5', datetime = '2020-7-26 14:14';
INSERT INTO myTable SET name = 'name_6', datetime = '2020-7-2 7:59';
INSERT INTO myTable SET name = 'name_7', datetime = '2020-8-3 6:22';
INSERT INTO myTable SET name = 'name_8', datetime = '2020-4-10 5:31';
INSERT INTO myTable SET name = 'name_9', datetime = '2020-3-3 16:44';
INSERT INTO myTable SET name = 'name_10', datetime = '2020-5-24 11:38';
INSERT INTO myTable SET name = 'name_11', datetime = '2020-5-24 16:35';
INSERT INTO myTable SET name = 'name_12', datetime = '2020-7-20 12:49';
INSERT INTO myTable SET name = 'name_13', datetime = '2020-9-11 15:17';
INSERT INTO myTable SET name = 'name_14', datetime = '2020-6-11 15:19';
INSERT INTO myTable SET name = 'name_15', datetime = '2020-12-30 17:40';
INSERT INTO myTable SET name = 'name_16', datetime = '2020-3-17 5:34';
INSERT INTO myTable SET name = 'name_17', datetime = '2020-12-9 23:41';
INSERT INTO myTable SET name = 'name_18', datetime = '2020-8-22 8:18';
INSERT INTO myTable SET name = 'name_19', datetime = '2020-9-10 14:59';
INSERT INTO myTable SET name = 'name_20', datetime = '2020-11-10 2:46';
INSERT INTO myTable SET name = 'name_21', datetime = '2020-11-27 19:11';
INSERT INTO myTable SET name = 'name_22', datetime = '2020-6-13 10:19';
INSERT INTO myTable SET name = 'name_23', datetime = '2020-8-1 4:53';
INSERT INTO myTable SET name = 'name_24', datetime = '2020-3-5 21:13';
INSERT INTO myTable SET name = 'name_25', datetime = '2020-9-7 16:51';
INSERT INTO myTable SET name = 'name_26', datetime = '2020-9-8 8:32';
INSERT INTO myTable SET name = 'name_27', datetime = '2020-10-17 2:45';
INSERT INTO myTable SET name = 'name_28', datetime = '2020-6-2 9:27';
INSERT INTO myTable SET name = 'name_29', datetime = '2020-3-2 13:23';
SELECT
    *
FROM
    (
    SELECT
        id,
        name,
        datetime,
        @rownum := @rownum + 1 AS rowNum
    FROM
        (
        SELECT
            @rownum := 0
        ) AS r,
        myTable
    WHERE
        YEAR(datetime) = '2020'
    ORDER BY
        datetime ASC
    ) AS ds
WHERE
    rowNum % 10 = 0 OR
    rowNum = 12


id
name
datetime
rowNum


28
name_28
2020-06-02 09:27:00
10

22
name_22
2020-06-13 10:19:00
12

26
name_26
2020-09-08 08:32:00
20
id	name	datetime	rowNum
28	name_28	2020-06-02 09:27:00	10
22	name_22	2020-06-13 10:19:00	12
26	name_26	2020-09-08 08:32:00	20